What's wrong with my Ford Focus' speedometer?

I have a high mileage 2000 Ford Focus 1.4 model. My speedo keeps dropping to 0 and I lose the mileage data at the same time. Does anyone have any ideas?

Why is my Ford Focus losing power?

My Ford Focus Zetec has recently started losing power whilst I am driving and the speedometer drops to zero. The car still moves but is very slow, and then after a few seconds the speedo jumps back up...

Traffic-haters

I have been searching to try and find info on 'Speed sensor operated traffic lights' without success. I seem to recall that I read either an article or reply to a readers question in the non too distant...