Topped up the screenwash on the Omega and Boxster - that was it for the day.
Will probably revisit Pierre tomorrow if my patience is feeling strong.
Refitted cambelt and other bits a couple of days ago and it wound over on the starter without any worrying noises.
No sign of it trying to start at all though.
Sprayed a bit of brake cleaner down the air intake and it fired up and ran for a few seconds.
Fault code suggests a problem with fuel supply, and it does indeed behave as though its not getting any fuel.
Cant imagine why it has decided to do this when the cambelt apparently jumped a few teeth while it was ticking over though.