Hallelujah,
After a seeming eternity I found the fault. Nothing wrong with the ECU or TPS or the TP. Two wires at the base of the joining connector (ECU and T/P) had frayed to the point that they were just holding on. I re-soldered and away it went. Well 7 of the 8. In the process I found that Injector 1, whilst receiving a pulse and having the correct resistance must be stuck - I will work on that next. But a big thank you to all of you. It goes to show how such a small thing can cause such a headache.
Signing off ( for a little while at least )
Peter
Thank you