The Town and Country Planning (Mayor of London) (Amendment and Transitional Provision) Order 2026
This Statutory Instrument amends the Town and Country Planning (Mayor of London) Order 2008 to update procedural references and introduce significant changes to how development proposals of strategic importance (PSI applications) are handled within Greater London, notably by inserting a new Category 3J covering developments involving 50 or more residential units, which triggers specific notification and potential direction powers for the Mayor of London, while also extending the Mayor's direction power to Category 3D development.
Arguments For
Introduces specific oversight mechanisms, via Category 3J, for large residential developments (50+ units), ensuring the Mayor of London can intervene where such projects impact the Spatial Development Strategy.
Clarifies and updates existing procedural references within the 2008 Order by replacing obsolete references to the GDPO with the current DMPO, improving administrative accuracy.
Establishes a clear, time-bound (21-day) notification process for Category 3J applications, balancing local authority decision-making speed with the Mayor's strategic oversight capability.
Allows the Mayor to intervene in Category 3D applications (Green Belt/MOL development over 1,000 sqm) by giving the Mayor the power to direct determination, strengthening strategic control over sensitive land.
Arguments Against
The introduction of new procedures, such as the specific 21-day window for the Mayor to intervene on Category 3J applications, could potentially slow down the planning determination process for local authorities.
Creating a new specific category (3J) adds complexity to the classification system for Potential Strategic Importance (PSI) applications, potentially increasing administrative burden on applicants and authorities locating the correct procedural path.
Granting the Mayor the power to direct the determination of Category 3D applications provides significant power over local land use decisions concerning Green Belt or Metropolitan Open Land, which might conflict with local priorities.
Transitional provisions are necessary to manage the shift in rules, but they inherently create ambiguity for applications submitted just before the commencement date, requiring careful tracking of version control.
STATUTORY INSTRUMENTS
2026 No. 345
TOWN AND COUNTRY PLANNING, ENGLAND
The Town and Country Planning (Mayor of London) (Amendment and Transitional Provision) Order 2026
Made - - - -
24th March 2026
Laid before Parliament
25th March 2026
Coming into force - -
11th May 2026
The Secretary of State makes this Order in exercise of the powers conferred by sections 2A, 2D, 59(1), 74 and 333(8) of the Town and Country Planning Act 1990( 1 ).
This section identifies the legislation as a Statutory Instrument, numbered 2026 No. 345, pertaining to Town and Country Planning in England.
It lists the title, the date it was made (March 24, 2026), the date it was presented to Parliament (March 25, 2026), and its commencement date (May 11, 2026).
The Secretary of State enacted this Order using powers granted under specific sections of the Town and Country Planning Act 1990.
Citation, commencement and extent
- -(1) This Order may be cited as the Town and Country Planning (Mayor of London) (Amendment and Transitional Provision) Order 2026.
- (2) This Order comes into force on 11th May 2026.
- (3) This Order extends to England and Wales.
Article 1 sets out the short title for the legislation, confirming it is the Town and Country Planning (Mayor of London) (Amendment and Transitional Provision) Order 2026.
It confirms the operative date as May 11, 2026, and specifies that the Order's reach includes both England and Wales.
Interpretation
- In this Order-
'the 1990 Act' means the Town and Country Planning Act 1990;
'the 2008 Order' means the Town and Country Planning (Mayor of London) Order 2008( 2 ); 'commencement date' means 11th May 2026;
- 'Mayor' and 'PSI application' have the meaning given in article 2(1) of the 2008 Order;
( 1 ) 1990 c. 8. Section 2A was inserted by section 31(2) of the Greater London Authority Act 2007 (c. 24) and amended by paragraph 31 of Schedule 22 to the Localism Act 2011 (c. 20), paragraph 2(1) and (2)(a) of Schedule 1 to the Growth and Infrastructure Act 2013 (c. 27) and section 149(1) of, and paragraph 2 of Schedule 12 to, the Housing and Planning Act 2016 (c. 22). Section 2D was inserted by section 31(2) of the Greater London Authority Act 2007 (c. 24). Section 74 was amended by section 19(1) of, and Schedule 19 to, the Planning and Compensation Act 1991 (c. 34), section 344(9) of the Greater London Authority Act 1999 (c. 29), paragraph 9 of Schedule 12 to the Localism Act 2011 (c. 20), paragraph 10 of Schedule 4 to the Infrastructure Act 2015 (c. 7), section 149(2) and (3) of, and paragraph 17 of Schedule 12 to, the Housing and Planning Act 2016 (c. 22) and paragraph 1(10) of Schedule 9 to the Levelling-up and Regeneration Act 2023 (c. 55). Section 333(8) was inserted by section 130(1)(b) of the Levelling-up and Regeneration Act 2023 (c. 55).
( 2 ) S.I. 2008/580; relevant amending instruments are S.I. 2010/602, 2011/550.
'section 73 application' means an application under section 73 of the 1990 Act (application to develop land without compliance with conditions previously attached).
Article 2 defines key terms used throughout the Order. 'The 1990 Act' refers to the primary Town and Country Planning Act, and 'the 2008 Order' refers to the principal Order being amended.
The 'commencement date' is established as May 11, 2026.
The terms 'Mayor' and 'PSI application' (Potential Strategic Importance application) retain their definitions from the 2008 Order.
Additionally, a 'section 73 application' is defined as a request to modify existing planning permissions.
Amendment of the 2008 Order
- The 2008 Order is amended in accordance with articles 4 to 10.
Article 3 confirms that the substantive changes to the existing 2008 Order are detailed in the subsequent articles, specifically Articles 4 through 10.
Amendments to article 2
- In article 2 (interpretation)-
- (a) in paragraph (1)-
- (i) after the definition of 'the Use Classes Order', insert-
''the DMPO' means the Town and Country Planning (Development Management Procedure) (England) Order 2015( 3 );
'Category 3J application' means an application which is a PSI application only by virtue of Category 3J of the Schedule;';
- (ii) omit the definition of 'the GDPO';
- (b) in paragraph (2), for 'article 20(3) (time periods for decision) of the GDPO' substitute 'article 34(4) and (5) of the DMPO (time periods for decision)'.
Article 4 modifies the interpretation section (Article 2) of the 2008 Order.
It inserts a definition for 'the DMPO' (Development Management Procedure Order 2015) and defines a 'Category 3J application' as one that qualifies as a PSI application solely because of the new Category 3J designation.
Simultaneously, it removes the definition of 'the GDPO' (General Development Procedure Order), replacing references to its time period articles with corresponding articles in the DMPO.
Revocation of article 3
- Omit article 3 (land excluded from the application of section 2A).
Article 5 removes Article 3 from the 2008 Order, which previously detailed specific land areas excluded from the Mayor's power to direct determination under section 2A of the 1990 Act.
Amendment to article 4
- In article 4 (notification to the Mayor of applications of potential strategic importance), after paragraph (2), insert-
'(3) Paragraph (2) does not apply with respect to a Category 3J application.'.
Article 6 amends the article dealing with notifying the Mayor about PSI applications.
It adds a new paragraph (3), stating that the existing requirement in paragraph (2) for notification does not apply specifically to Category 3J applications.
Amendments to article 5
- In article 5 (determination of PSI applications)-
- (a) in paragraph (1), for 'paragraph (2)' substitute 'paragraphs (1A) and (2)';
- (b) after paragraph (1), insert-
'(1A) Paragraph (1) does not apply with respect to a Category 3J application.
(1B) In the case of a Category 3J application, the local planning authority must not refuse the application unless-
(a) the authority has sent to the Mayor-
(i) a copy of any representations made to the authority in respect of the application;
(ii) a copy of any report on the application prepared by an officer of the authority;
(iii) a statement setting out that the authority proposes to refuse the application and giving full reasons for the proposed refusal; and
(iv) a statement of any proposed planning conditions, a draft of any proposed
planning obligation and details of any proposed planning contribution; and
(b) either-
(i) a period of 21 days has elapsed beginning with the date notified in writing by the Mayor to the authority as the date on which he received the documents referred to in sub-paragraph (a); or
(ii) the Mayor has notified the local planning authority in writing that he is content for the authority to determine the application in accordance with the statement referred to in sub-paragraph (a)(iii).
(1C) As soon as practicable after receiving the documents referred to in paragraph (1) (a) or (1B)(a), the Mayor must notify the local planning authority in writing of the date on which he received those documents.';
- (c) in paragraph (2), for 'Paragraph (1) shall' substitute 'Paragraphs (1) and (1B) do'.
Article 7 extensively modifies Article 5 regarding the determination of PSI applications, particularly for Category 3J applications.
Paragraph (1A) states that the general determination rule in paragraph (1) is suspended for Category 3J applications.
A new sub-article (1B) imposes strict conditions before a local authority can refuse a Category 3J application: they must send the Mayor all representations, officer reports, proposed refusal reasons, and details of proposed conditions/obligations.
The authority must then wait 21 days after the Mayor acknowledges receipt, or until the Mayor confirms he does not wish to intervene (i.e., direct determination).
New paragraph (1C) mandates the Mayor must promptly confirm the date of receipt of these documents.
Finally, paragraph (c) ensures that the rule regarding call-in power in paragraph (2) now covers both the standard determination rule (1) and the new refusal requirements (1B).
Amendments to article 6
- In article 6 (Mayor's power to direct refusal of a PSI application)-
- (a) at the beginning insert-
'(A1) This article does not apply with respect to a Category 3J application.';
- (b) in paragraph (2), omit sub-paragraph (e);
- (c) in paragraph (7)(b), for 'article 20(1) of the GDPO' substitute 'article 34(1) of the DMPO';
- (d) in paragraph (10), for 'article 25 of the GDPO (register of applications)' substitute 'article 40 of the DMPO (register of applications and biodiversity gain plans)';
- (e) omit paragraph (11).
Article 8 amends the provisions governing the Mayor's power to direct refusal of a PSI application (Article 6).
A new clause explicitly states that this power does not apply to Category 3J applications.
Furthermore, outdated references to the GDPO (specifically articles 20(1) and 25) are replaced with the current corresponding articles (34(1) and 40) in the DMPO. An entire sub-paragraph (e) of paragraph (2) and paragraph (11) are also removed.
Amendments to article 7
- In article 7 (direction that the Mayor is to be the local planning authority)-
- (a) in paragraph (1), for sub-paragraph (a) substitute-
- '(a) the impact criterion is met;';
- (b) after paragraph (1), insert-
- '(1A) For the purposes of paragraph (1), the impact criterion is met if-
- (a) for a Category 3J application, the development or any of the issues raised by the development to which the application relates would have an impact on the implementation of the spatial development strategy;
- (b) in any other case, the development or any of the issues raised by the development to which the PSI application relates is of such a nature or scale that it would have a significant impact on the implementation of the spatial development strategy.';
- (c) in paragraph (3)(a), after 'Category 1A', insert 'or Category 3J';
- (d) in paragraph (4), after 'Category 1A', insert 'or Category 3J'
- (e) for paragraph (5) substitute-
'(5) A direction under paragraph (1) may not be given after-
(a) in the case of a Category 3J application, the end of the period referred to in article 5(1B)(b)(i);
(b) where paragraph (6) applies, the end of the period of 14 days beginning with the date on which the Mayor received the applicant's request;
(c) in any other case, the end of the period referred to in article 5(1)(b)(i).';
(f) in paragraph (6)(a), for 'article 20(2) of the GDPO' substitute 'article 34(2) of the DMPO';
(g) in paragraph (8), for 'article 25 of the GDPO (register of applications)' substitute 'article 40 of the DMPO (register of applications and biodiversity gain plans)'.
Article 9 updates Article 7 concerning when the Mayor can be directed to take over determination of a PSI application.
The condition for direction is now simply that the 'impact criterion' (defined in the new paragraph 1A) is met.
The criterion is met if, for a Category 3J application, the development impacts the spatial development strategy, or in all other cases, if the development has a 'significant impact' on that strategy.
This modification updates checks for Category 1A applications and sets a new deadline for issuing directions on Category 3J applications, tying it to the 21-day window established in Article 5(1B)(b)(i).
Procedural references to GDPO in paragraphs (6)(a) and (8) are replaced with DMPO equivalents.
Amendments to the Schedule
- -(1) The Schedule (PSI applications and categories of development) is amended as follows.
(2) In 'Definition of PSI application', in paragraph 1(2),for 'a category set out in Parts 1 or 2 below.' substitute 'one of the following categories set out below-'
- '(a) a category in Parts 1 or 2;
- (b) Category 3D;
- (c) Category 3J.'.
- (3) In Part 1 (large scale development), in Category 1B, omit paragraph 2(b).
- (4) In Part 3 (development which may affect strategic policies), after Category 3I, insert-
' Category 3J
- Development which comprises or includes the provision of 50 or more houses, flats, or houses and flats.'.
(5) In Part 4, in Category 4, in paragraph 1, for 'article 10(3) of the GDPO' substitute 'article 18(4) of the DMPO'.
Article 10 revises the Schedule of the 2008 Order, which lists the types of development classified as PSI applications.
Paragraph (2) ensures that Category 3J applications are now included in the general definition of a PSI application alongside categories already listed in Parts 1 and 2, and Category 3D. Paragraph (4) formally inserts the new 'Category 3J,' which covers development involving 50 or more houses, flats, or a combination thereof.
Other minor amendments include omitting a sub-paragraph in Category 1B and updating a procedural reference in Part 4 to use the DMPO.
Transitional provisions
- -(1) Paragraph (2) applies in relation to an application for planning permission-
- (a) which falls within Category 3D of the Schedule to the 2008 Order,
- (b) which is sent to the Mayor under article 5(1)(a) of the 2008 Order before the commencement date, and
- (c) in relation to which, before the commencement date, the Mayor is not permitted to give a direction under section 2A of the 1990 Act that he is to be the local planning authority for the purposes of determining the application.
(2) Where this paragraph applies, notwithstanding the amendment made by article 10(2), the Mayor may not give a direction under section 2A of the 1990 Act that he is to be the local planning authority for the purposes of determining the application.
(3) Paragraph (4) applies in relation to an application for planning permission which-
- (a) is received by the local planning authority before the commencement date, and
- (b) does not meet the definition of 'PSI application' in the 2008 Order as it has effect immediately before the commencement date.
(4) Where this paragraph applies, notwithstanding the amendment made by article 10(4), the local planning authority is not required to notify the Mayor of the application under article 4(1) of the 2008 Order.
(5) The amendments made by this Order do not apply in relation to a section 73 application where the previous planning permission was granted before the commencement date.
Article 11 introduces transitional rules to manage applications caught between the old and new legislation which starts on May 11, 2026.
Paragraphs (1) and (2) restrict the Mayor's power to direct determination in specific Category 3D cases that were already in process before the commencement date and where the Mayor could not previously intervene.
Paragraphs (3) and (4) state that if an application was received by the local authority before the commencement date but would now be classified as a PSI application due to the changes (e.g., insertion of Category 3J or D), the authority is not required to notify the Mayor under Article 4(1).
Finally, paragraph (5) ensures that applications seeking only minor variations to previous permissions (section 73 applications) are governed by the old rules if the original permission predates the commencement date.
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