Subsection (2) applies where—
The chargeable interest deemed to be acquired as mentioned in subsection (1)(b) is taken to be in or over land that consists of or (as appropriate) includes a dwelling.
If at any time after the substantial performance of the contract the obligation under the contract to carry out the construction or adaptation ceases to have effect without the construction or adaptation having been begun, subsection (2) ceases to apply at that time.
A building or part of a building used for a purpose specified in section 116(2) or (3) of FA 2003 is not used as a dwelling for the purposes of subsection (1).
In this section—
"contract" includes any agreement (including, in the case of Scotland, missives of let not constituting a lease);
"substantially performed" has the same meaning as in section 44 of FA 2003.