well I bought a P10 egt non nats Ecu off of eBay and swapped the pins on this and it ran great.
I then pulled the loom apart and found the Lambda wiring and got that all wired back in as I had cut it off by accident before.
After tidying everything up in the engine bay and making sure the radiator fan was working properly I can happily say the cars emissions are great now
co = 0.21%
HC = 44ppm
lambda = 1.020
so there is a few things left to tidy up for the MOT then it should fly through!