Overpaid CGT on sale of business

Following the sale of a business, according to the terms of sale agreement the consideration was to be received over 24 monthly instalments, and CGT was paid on the full disposal value at the point of sale. However the buyer is now facing insolvency and it is unlikely the remaining instalments will be received. What is the process for claiming a partial refund on the CGT paid, as the actual consideration is now less than was reported and taxed?

Hi Deborah Rees,
please refer to CG14933 - Deferred consideration: ascertainable: claims that consideration is irrecoverable.
Any claim must be made in writing and sent to
HMRC
PAYE & Self Assessment
BX9 1AS
Thank you.