Boiler wiring valiant

[George1204]

Hello All. Hoping you guys can help me out some here please. Valiant boiler combi. Old wiring to timer and boiler removed during rewire. Advice needed on how to wire up boiler to new timer and room stat. Dediciated fused spur for boiler and exisiting 3 core wire from room stat in place. Boiler flex is 4 core. L N E and black wire. 1. can someone help me with the wiring setup and or 2. can I get the boiler to run heating without timer and room stat connected? cheers Thanks P