Another update. just after the last update I found the MOT was due in a month, I found I could check the history online.
Car has never passed an MOT first time. Always fails on ESP/ABS faults and lack of power steering. Then passes the same day at the same garage.
Since the fault was not everytime for me I guess the garage testing it just left it for a bit and retested later.
The advisory note on the last MOT (again on it second attempt of the day) had been removed and this also stated the ESP/ABS fault.
I passed this onto the garage I bought it from, who passed the information and problems that the Main Dealer is having identifying and fixing the faults to where they bought it from (a lease car company).
Within 30 mins the lease company had been back on the phone to say they had faults like this on their cars sometimes becasue they fit black boxes that monitor driving, milage and record gps position, and that it was possible they had left one on.
They drove from who knows where to the Main Dealer and removed the black box that was still there.
The car has not been tried since, I think because the wiring loom is still a mess from its testing.
Also Citroen have agreed to send out a Field Tech so on the 8th of October someone should be looking at the car to fix the faults!
I have been hinted at that I should not contact the Main Dealer again because there will not be any more updates until then.
I do wonder where on the car you can hide a black box that must plug into the wiring loom somewhere but not be found by someone inspecting the entire wiring loom three times.