Update:
There's power at all the coil packs (just over 10 volt each). There's power at the relays at the ecu when ignition is off (12v) but its still there when the ignition is on, so obv relays aren't actuating, and we have a problem.
Unsure if related, but fuel pump is not coming on with ignition either.
Assume there is a failure in power supply somewhere?
Also, unrelated I think, found that the earth cable to the battery was busted, now fixed.
Ecu and coils/ ign are earthed.
Pulled cas off, locating pin is there, connected the plug and spun with my fingers and got nothing from the injectors. Tried with a second cas for same result. Assume this is also a problem from relays not locking in.