Diagram is sh*t so I'll try again later when I can see the car...
The MS grounds the FP relay, but I have wired the +ve from the switched 12V line, I'm going to wire it to the perm 12V instead, see if that fixes it.
Another problem is that its idling at 1500 instead of 900, Its getting too much air now the old moving plate airflow meter has gone through some of the brake servo pipework. I'm going to bung it up see if that works bringing the idle down, then I'll make up a restricter plate (By which I mean put a washer in the pipe...
Runs well at (fast) idle, very well infact. Going to be brave and book an MOT for next week if I can...