The purple "money" tab at the top will help you to compare interest rates in bank savings accounts. In my view, you should put some of the money into a stocks and shares ISA and/or one of the larger UK unit trusts or investment trusts. If your priority is to keep risk low, the amount that goes into equity-based investments should be a small percentage of the total - maybe just £5000 - but investing in bank savings accounts will do little more than keep up with inflation before any withdrawals.
Another option that will suit some people but not others is to start or take over a business. If this has any appeal, it's worth looking at Daltons Weekly, to move cautiously and not to put all your money into something like this.