That's what I thought!

Figured the atmospheric connection was OK. Induction kit is indeed present rather than the stock air box

I can hear it clicking and, assuming it's like a standard boost solenoid, that pretty much is all it does. The only thing I'm left with is assuming the ECU is actuating it at 1 bar, don't suppose there is an easy way of finding that out though

Does anyone keep a spare stock of Amal valves that they'd be happy to send over if I cover postage or is that not something you guys do?