Ok so no power to the pump right away indicates to me, an issue with the DME relay, one of the components which trigger the relay, or the wiring to the pump/fuse itself. There are no other components that control powering the pump, so its got to be one of those things.
If you review the
diagram of the relay (you have been reading and using Clarks to do your diagnosis I hope) youll see that in order to power the pump it needs power from battery (pin 30), ignition switch voltage (pin 86), DME ground (pin 85), ground from DME to pickup fuel pump (pin 85b) and then power to fuel pump (87b). You should check all those pins in the fuse panel for either ground or continuity/voltage. If any of those fails, you know where to start looking.
Start there and work through those pins until the pump comes on and you are getting fuel (and correct fuel pressure, yes with a gauge on the rail), then move over to diagnosing the no spark condition. George linked a very very useful page above to the Clarks Garage engine troubleshooting guide. I recommend reading through it, follow the no fuel and no spark diagnosis steps. If you have fuel pressure and you confirm spark, the next step is to look at whether injectors are getting 12V (wiring) and if so, a firing signal (noid light) - this is also outlined on Clarks.