I parked the car on a hill the and turned the wheels into the kerb. When I got out of the car I noticed a disconnected lead, possibly purple in colour (it's dark-ish outside!), in the wheel arch. I could see both ends of tthe disconnected lead, and on inspecting the other side found that to be the same too.
Didn't want to hang about outside to investigate further as it hasn't stopped raining all day... anyone got any ideas as to what they are/do?! I haven't noticed anything not working so can only suppose they've been disconnected from when I bought the car!
I'll get round to buying a Haynes one day
