Paragraph 17
Where a joint liability notice is given to an individual at a time when the company to which the notice relates has ceased to exist, a reference in this Schedule to the individual being jointly and severally liable with the company for an amount is to be read as—
a reference to the individual being solely liable for that amount (where no other individual is given a joint liability notice in respect of it), or
a reference to the individual being jointly and severally liable for that amount with each other individual who is given a joint liability notice in respect of it.
The tax liability at a particular time of a company which no longer exists at that time is treated for the purposes of this Schedule as being whatever it was immediately before the company ceased to exist.