the building has been rendered unsafe or otherwise uninhabitable by the action or inaction of any person having an interest in the land on which the building stands and it is practicable to secure safety or health by works of repair or works for affording temporary support;

the demolition is “relevant demolition” for the purposes of section 196D of the Act (demolition of an unlisted etc building in a conservation area) M1; or

the building is a specified building and the development is undertaken during the specified period, regardless of whether, in relation to the development, a prior approval event has occurred.