So Amazon Prime are increasing the monthly subscription from £7.99 to £8.99 per month. Received this email today
As of 15 September 2022, the price of the monthly Prime membership will increase from £7.99 to £8.99, and the price of the annual Prime membership will increase from £79 to £95. The new price will apply to renewals starting 15 September 2022. You can view your next renewal date, manage, or cancel your membership by visiting your account.
I have to admit, I wasn’t even aware that you could pay for it annually 
Anyway, here’s an idea which works out at £6.58/mth for the next 12 months