that really is not alot, think of one night out including a cheap meal, or alot of drinking. Unless you are only going to be in the uk for less than 6 months it really is worth buying some tools. That kit will allow you to do most things and make life so much easier.
Check out wiggle they do a cheap tool kit for 34 quid http://www.wiggle.co.uk/ProductDetail.aspx?Cat=cycle&ProdID=5360031531&N=LifeLine%20Workshop%20Tool%20Kit
that really is not alot, think of one night out including a cheap meal, or alot of drinking. Unless you are only going to be in the uk for less than 6 months it really is worth buying some tools. That kit will allow you to do most things and make life so much easier.