have you checked basic cam timing/phase timing is ok?
is it good clean fuel that is getting through? Yes as car was running perfect 2 weeks ago. Took it for a quick spin up and down the road, no issues.
do you have good compression? Don't know but I presume all is good, might have to revisit this one.
coolant temp sensor-is connection good-have you tried a different sensor
is engine earth ok[try jump lead battery-engine] remade cts as part of troubleshooting. Resistance test seems ok. I have a spare but didn't change it yet. Engine earths haven't been checked but haven't been touched either.
are all other earth points good. Other earths should be fine as haven't been touched.
do all relays work properly[not just click] Don't know for sure, guess I'd know of it started.
are the plugs on phase sensor and around front of engine correct? Plugs are correct yes.
is crank pulley key still intact? 4 lugs on crank pulley are spot on. Pump is priming so cps sensor signal is ok, from what I've read on here.

cant think of anything else atm-but hope some of the above gives you fresh ideas
good luck

Thanks very much for the tips Tony. Working today so won't get home til 9pm, will try the ideas later.

Hi James,

I've no fuel pressure gauge. Initially we thought this was the issue as removed return pipe from bottom of regulator and fuel was pissing out. Got another fpr but not sure if this one is working either!! Clamped the pipe by hand for a couple of secs to try and build pressure but the bugger still won't start. Initially we had no fuel to plugs and now I do. Albeit it doesn't se likeucj so we thought the signal to open the injectirs wasn't getting through. Think it's from the dps. Anyway have fuel now and spark but still won't fire. Thanks for the help James.

I can do that yes but will either be tonight after 9pm or tomorrow evening. Thanks for the tips.

Will keep this updated. Thanks a million lads. What a bloody nightmare