Banks are screaming for money on deposit go and negotiate a good deposit rate on flexible terms so you can access your money.
If you don't need a house you could look at investing in a Business Expansion Scheme, a lot available with focus on green energy providers.
If you are happy giving it to Paddy Power, I'll change my name!
Mick, you'd need to provide alot more info before anyone could offer any advice - what is your current situation (job & job secutity, marital status, kids, career developement, do you own a house, how much money are you talking about) and what are you ambitions (other than to pick a 5/1 winner at Paddy Powers)