“ Proceedings for questioning the validity of other orders, decisions and directions. (1) If any person – (a) is aggrieved by any order to which this section applies and wishes to question the validity of that order on the grounds – (i) that the order is not within the powers of this Act, or (ii) that any of the relevant requirements have not been complied with in relation to that order; or (b) is aggrieved by any action on the part of the Secretary of State to which this section applies and wishes to question the validity of that action on the grounds – (i) that the action is not within the powers of this Act, or (ii) that any of the relevant requirements have not been complied with in relation to that action, he may make an application to the High Court under this section. …. (5) on any application under this section the High Court – (a) may, subject to subsection 6, by interim order suspend the operation of the order or action, the validity of which is questioned by the application, until the final determination of the proceedings; (b) if satisfied that the order or action in question is not within the powers of this Act, or that the interests of the applicants have been substantially prejudiced by failure to comply with any of the relevant requirements in relation to it, may quash that order or action…” (a) is aggrieved by any order to which this section applies and wishes to question the validity of that order on the grounds – (i) that the order is not within the powers of this Act, or (ii) that any of the relevant requirements have not been complied with in relation to that order; or (b) is aggrieved by any action on the part of the Secretary of State to which this section applies and wishes to question the validity of that action on the grounds – (i) that the action is not within the powers of this Act, or (ii) that any of the relevant requirements have not been complied with in relation to that action, he may make an application to the High Court under this section. (a) may, subject to subsection 6, by interim order suspend the operation of the order or action, the validity of which is questioned by the application, until the final determination of the proceedings; (b) if satisfied that the order or action in question is not within the powers of this Act, or that the interests of the applicants have been substantially prejudiced by failure to comply with any of the relevant requirements in relation to it, may quash that order or action…”
“(a) some or all of the parts of the building used for any purposes within Class A1 …. shall be situated on a floor below the lowest part of the building used as a flat; (b) where the development consists of a change of use of any building with a display window at ground floor level, the ground floor shall not be used in whole or in part as a flat. (c) a flat shall not be used otherwise than as a dwelling (whether or not as a sole or main residence) (i) by a single person or by people living together as a family, or (ii) by not more than six residents living together as a single household, (including a household where care is provided for residents).” (i) by a single person or by people living together as a family, or (ii) by not more than six residents living together as a single household, (including a household where care is provided for residents).”
“‘Flat’ means a separate and self-contained set of premises constructed or adapted for use for the purpose of a dwelling and forming part of a building, from some other part of which it is divided horizontally.” ‘building’ a) includes any structure or erection and except in Parts 24, 25, 33 and 40 Class A of Part 31 and Class C of part 38 of schedule 2, includes any part of the building as defined in this article; and b) does not include plant or machinery and in Schedule 2, except in class B of Part 31 and Part 33, does not include any gate, fence, wall or other means of enclosure”
“3. The principal consideration in this case is whether Schedule 2, Part 3, Class F contemplates the creation of separate planning units from a single planning unit. The proposal before me would result in an arrangement whereby the proposed flat at first floor level would have no functional, physical or personal association with the retail use at ground floor level. Class F (a) permits the change of use of a building to a mixed use for any purpose within Class A1 (shops) of the Schedule to the Use Classes Order and as up to two flats, from a purpose within Class A of that schedule. The wording of Class F (a) was revised by theTown and Country Planning (General Permitted Development) (Amendment) (No 2) (England) Order 2012 which came into force on1 October 2012 . Prior to that revision, Class F (a) permitted the change of use to one flat. …. 7. The term “mixed use” is not defined in the GDPO or in theTown and Country Planning Act 1990 . The judgment in the Burdle v. Secretary of State for the Environment (1972) established the test that “within” common ownership, it is only possible to identify a separate planning unit where there is a functional or physical separation of activity”
“Policy Background What is being done and why 7.1 We wish to create the opportunity to bring vacant and underused properties back into economic use and at the same time contribute to delivering more homes. Currently, the ancillary space associated with a retail unit (A1) or financial/professional services unit (A2) can be converted into residential, as long as the A1 or A2 use is on a floor below the residential part of the building, there remains a ground floor shop frontage/display window, and only a single flat is created as a result of the change of use. 7.2 While the current provision allows for converting ancillary A1/A2 space into a single flat, we now want this provision to be extended to no more than two flats so as to incentivise the conversion to housing of vacant space above retail units in town centre and elsewhere. 7.3 We would expect that such conversions could often be effected without requiring any other form of planning permission, but if external works (such as separate access where needed, then a planning application would need to be made).”
“…. it may frequently occur that within a single unit of occupation two or more physically separate and distinct areas are occupied for substantially different and unrelated purposes. In such a case each area used for a different main purpose (together with its incidental and ancillary activities) ought to be considered as a separate planning unit .… Bridge J went on to say: “.… It may be a useful working rule to assume that the unit of occupation is the appropriate planning unit, unless and until some smaller unit can be recognised as the site of activities which amount in substance to a separate use both physically and functionally ….”
“…. the proposed development would consist of a change of use to a mixed use of shop and flat within the same building notwithstanding that they would be physically and functionally separate and constitute separate planning units. It would therefore represent permitted development in accordance with Schedule 2, Part 3, Class F (a) of the Town and Country Planning (General Permitted Development Order) 1995 as amended.”