[Closed] Fixed rate mortgages - how long?

For my next house I am seriously considering a fixed rate mortgage. I'm a paranoid person with money and I want the reassurance that my monthly payments aren't going to skyrocket if the interest rates go up. As my mortgage will be less than £100k the amount I have to pay extra for a fixed rate isn't too much (looking at £20-30 extra ish).

I reckon that a fixed isn't worth getting unless you go for at least 5 years - if you went for a 2 year one at the moment it'd be a bit crazy as the rates aren't going up for a while yet (maybe!). But do you reckon a 10 year one might be worth it? I reckon the rates are never going to be as low as they are now so it should be an ideal time to go for it. However there are penalties for early redemption. My thinking is that if I ever get enough cash to pay the mortgage off in one go I'll be very happy to pay a fee on top! Anyway if we get a house that has space to expand with extensions and stuff we can spend money on doing that instead.

Sorry for the ramblings....