Where can I put my money that won't make me angry?

that would be ok, in some ways what I really want to do is put the money somewhere and then forget about it. Thanks, I'll look into Nationwide

Don't listen to these people, they'll all tell you to get what they have :p

An ISA is a great thing to have, but it's also best to manage it carefully (once a year or so is enough). Read up here: http://www.moneysavingexpert.com/savings/best-cash-isa - that site tells you why you would want one, how to manage one, and what the best interest rates to restrictions are currently. Generally speaking you should max out your ISA before you start investing in markets as it gives you a solid rate of tax-free return that you can base your next financial adventures on.

Edit: Sparky ^ is also bang-on. Fees and interest on debt always trample all over any interest you can earn in a savings account of any kind, so by putting money into savings instead of pumping it all into repaying debt, you'd be costing yourself money.