Andy Hall wrote:

The popular standard is CAT5e UTP (i.e. unshielded) cable. 300m will
cost you about £35.

Just going off at a slight tangent, I called in to the large B&Q on the
outskirts of Newbury yesterday and noticed that they were selling
made-up CAT5e cables and associated kit (RJ45 wall plates etc.). Guess
this must mean that home networking has finally reached the "man in the
street". ;-)