Breakdown cover - the judge
For what it is worth I have recently taken out breakdown cover with Breakdown Direct, as seen on the right hand side of this site. Their prices seem very competitive compared to the AA/RAC etc, but what swung if for me was that by buying their 301 cover, I also got "free" legal expenses cover. At the moment I buy this through my motor insurer, for which I pay somewhere in the region of £15-20, if memory serves me right, which I will dump when renewal comes around.

They don't do personal cover like AA/RAC, i.e it is the car that is covered not me, so if you drive more than one mode of transport e.g. car and motorbike (not at the same time!) you may be better off elsewhere.