If a notice under section 352, . . . or 372 (notices requiring the execution of works) is not complied with, the local housing authority may themselves do the work required to be done by the notice.
Compliance with a notice means beginning and completing the works specified in the notice—
If, before the expiry of the period which under subsection (2) is appropriate for completion of the works specified in the notice, it appears to the local housing authority that reasonable progress is not being made towards compliance with the notice, the authority may themselves do the work required to be done by the notice.
Not less than seven days before a local housing authority enter any house for the purpose of doing any works by virtue of subsection (1) or subsection (3), they shall serve notice of their intention to do so on the person on whom the notice referred to in subsection (1) was served and, if they think fit, also on any other owner of the house.
If, after a local housing authority have served notice under subsection (3A), the works are in fact carried out (otherwise than by the authority), any administrative and other expenses incurred by the authority with a view to doing the work themselves in accordance with subsection (1) or subsection (3) shall be treated for the purposes of subsection (4) (and Schedule 10) as expenses incurred by them under this section in carrying out the works in a case where the notice referred to in subsection (1) has not been complied with.
The provisions of Schedule 10 apply with respect to the recovery by the local housing authority of expenses incurred by them under this section.