Well, if you ask me, you should withdraw all funds and make the cheques payable to me, c/o the Caymen Islands. No wait, ask your dog where to invest it.
Seriously, asking a random forum where the people who reply are not held accountable for their advice doesn't really seem to be the best way to get your investment advice. What is your recourse if the advice you act on ends up costing you more than another option would have? This is your life savings; you've worked all your life for it! Why take such a huge risk? Seek a top UK tax advisor as Guya recommended to you; rather than putting yourself at the mercy of the fickle finger of fate (better known as the web).