Did two things today:
1) as per this thread - http://www.sxoc.com/vbb/showthread.p...-timing-retard I have been having trouble with what we believe is fake knock signals/warnings being generated, and it's been causing all sorts of problems. So by-passed sensor with a 560KOhm resistor. Took car for a drive and no signs of knock warnings now which is fab. So should be able to get on with the business of mapping the car now.
2) Noticed strong smell of petrol from cold side of engine today. May be the replacement fuel pipes from earlier in this thread. Possibly I used some un-suitable pipes. So I have ordered some new fuel pipe from Ebay and I'll replace them again and hopefully that will sovle the issue.