Exhaust repaired - a piece of mild steel pipe joining the stainless backbox to the original centre pipe had rusted badly, leaving the back box bouncing around, though still hanging on - on the upside it did seem to massively reduce the drone I suffer with the stainless back box...
All solid again now, new piece of stainless welded in - drone fully reinstated
To do list is now reduced to:
Thermostat replacement
Cooling fan replacement
Steering pump/belt/pully noise to be investigated
Airbag light on - passenger seat related
Aircon leak to be checked
Roof, rear driver-side panel, spoiler, boot lid respray/clearcoat fix.
Alloy wheel refurb all round
Remove YMCA.mp3 from sdcard in head unit, which shuffle mode seems to keep finding somewhere