I doubt there will be a problem with MCB breaking capacities. I envisage a simple switch-fuse at the intake with a BS1361 cartridge fuse to the feeder.
By the time we get to the far end of the 200-yard subfeeder I suspect the PSCC will not be all that great.
Anyway, he's going to contact the PoCo and arrange an inspection visit at a suitable time for all of us to be there.
