So.
Cleaned the relays and no victory. 
Also changed some relays to make sure.
When ignition ON, there is 12V in the injector harness when voltmeter is from injector pin to battery negative terminal.
Well, that means the injectors are getting the supply they need, so the relay is OK. I'd be tempted to pull the fuel rail off complete with the injectors, and then crank it over. You should see squirts of fuel out of each injector as you crank it over (put your cigarette out first !). If for do see squirts of fuel, then chances are the fuel side of the equation is Ok, so your problem is likely ignition. No squirts of fuel, then it's a problem with the ECU not driving the injectors for some reason.
Or if you've got a spare injector, unplug the loom from one injector and connect it to your spare. As you crank it over you should be able to feel/hear the injector click.
I don't know what sort of injector drive the EVO500 has. Early C30SE's used single batch firing (all injectors fire at the same time). Later C30SE's had two banks of 3 batch fire (3 injectors all at the same time). And C36GET (Lotus) has individual control of all 6 (Sequential Fuel Injection).
Anyway, a fault in the wiring between ECU and injectors will stop all the injectors working on the early C30SE's, or stop half the injectors on the later C30SE's, or stop one injector on the C36GET. So depending on what the EVO500 has will affect how many injectors stop working.