Baxi Bermuda 5 does not fire up?

Yes there is 240 volts ,thats ok.I think it's the solenoid part which may have corroded or burnt out, it's too hard to see with it all connected. I suppose these valves are like dodo's to locate. It's only a pretty simple valve,not multi function,there is no resistance,having tested it.
ANY help in locating one of these old baxi valves would be much appreciated.It connects to a negative,a long green resister

LUCKY HARRY
February 2013

Is there live volt on gas valve if yes than change ,if no than fault is supply line

ltd
November 2012