The due date for reporting and paying CGT is generally by 31 January following the tax year in which the gain occurred. Example: For a capital gain realized in the 2023/24 tax year (ending 5 April 2024), the due date would be 31 January 2025. For UK property disposals (residential):
Gains on residential property must be reported and paid within 60 days of completion.
How did you guys get interest income in the joint question? Michael and Naomi only had Property, Employment and Dividend income and the question said to ignore the savings interest income