Firstly consider your tax free/tax efficent options (ISA & National Savings products)

With that sort of cash, once I'd put money into the options above, I'd consider an Investment Bond.

Wide range of funds to suit your attitude to risk, exposure to the stock market (if you want it) controlled by experienced fund managers. Tax efficent income.

These are all just ideas tho (not advice ), really you should sit down with a financial advisor who will do a fact find and recommend your best options.

Or you could give it to me