@ Salmo
Cheers for the info - I had already spoken to CAI / Caebont last Tuesday 16/4/19; they gave me advice on earths, supplies etc and told me a few possible vehicle-based causes of the "twitches"; they also offered a test and rebuild in case the fault is in the speedo.
But no, the dealer hasn't tested the speedo yet despite now rolling into the third week of no car. Instead they are going to try out a new sender which we are waiting for and hasn't turned up - apparently this part is no longer available from Ford!
This spec of car was "the one" for us when we saw it - and we did truly love this car to start with (8 weeks ago) but this is one of three early faults which are rapidly changing that!
Last edited by Ed1973; 27/04/19 07:32 AM.