Well that explains the no-start issue then
The starter interlock contacts have simply fallen off the F125! This was a relatively new switch too.
I replaced the contact carrier with one from a spare switch and reassembled
Now it starts on the key
Spent some time cleaning up all the under bonnet plastic stuff including the headlights
and unfortunately, now its in bits again
While doing the coolant flush I realised there is no flow through the cooling system, apart from the heater which has its own pump. I pulled the thermostat last night and tested that in a pan on the hob and it opens just the same as a known-good one, so it must be a water pump issue. Both pump and stat are new aftermarket, both brands I have used before, so I am rather vexed by it.
I'm going to check flow through the radiator, and assuming that is ok I'll replace the pump with a genuine one and see what happens.
I also have a problem with one of the new front flexi hoses leaking, also a known aftermarket brand. Can't win with this one at the moment
