Bollocks that ford can't tell you which sensor it is, you will have a fault code present, that will tell you which sensor is at fault, and what is actually wrong with the sensor. They just want more money out of you.

I am in Devon mate on saturday for 4 nights, I have got a fault code reader that can read the faults off for you. If its any help to you, pop along with the car and I'll do it for you no bother. Might be a bit of a trek for you though, its up to you!

Rich.