Paying CGT on a long term savings bond considering tax allowances

At the end of a 5 year bond, would I potentially pay the lower rate of tax (20%) on the profit or gain made after 1 year's tax allowance is taken into consideration or would I be allowed more than 1 years allowance (5 years?). In this simple case, assuming no other savings would potentially be subject to CGT.

Hi,

No you cannot use previous years allowances, only the allowances in the year the bond matures.

Thank you.