Ok, a quick update. Just been out to the car and I think I've found the sensor- behind the coil pack, right hand side rear of engine? Anyway, had a poke about and a spray of WD. Then I turned off the battery isolator left a while and back on.
Fired the car up, EPAS now working, speedo still not, and now the interior lights WON'T go off as opposed to not coming on. Could this be one of the ECU's or a power supply problem?
Been out again, lights have now gone off. This I'm not now worried about as I am pretty sure it is one of the microswitches on the locks.
EPAS still working, but no speedo.