Michael, thank you for your reply.
First of all, as the asset was bought in 1965. If you owned the asset on 31 March 1982, you'll need to work out the market value of the asset at 31 March 1982. You will use this in your Capital Gains Tax calculations instead of your actual costs up to that date.
Let's assume the valuation at 31 Mar 1982 was £28,000 and not £2,150. Your gain becomes (70,000-28,000) £42,000.
Your gain after gains annual allowance is (42,000-10,900) £31,100.
Capital gains tax rate on this gain will be 18% or 28% or a combination of both depending on your total income in the tax year of sale.
If you have no other income then this gain will be taxed at 18%.
If you already have other income and it is at least £32,010 after personal allowances then the gain will be taxed at 28%.
If your income after allowance is say £20,000 then first (32,010-20,000) £12,010 of the gain will be taxed at 18% and the balance (31,100-12,010) £19,090 will be taxed at 28%.
I hope this is helpful and answers your question.
If you have any other questions, please ask me before you rate my service – I’ll be happy to respond.