Yep, I didn't quite have the success that sp3ctre had, but I suspect that's more to do with whatever's causing my airbag light to illuminate still being at fault, i.e. it's reporting the fault immediately that I clear the light. I did manage to get the light out but only for about 0.5sec lol.
I'm uploading screen shots of the error message but at 0.3mbps line speed here it'll take all night. Hopefully in the morning I'll have the screenshot uploaded and can ask around for help identifying what the code means. It's likely to be the occupancy mat in the passenger seat though as I just tested something else which makes me suspect it ain't quite right: placing a heavy object on the passenger seat without the seatbelt being clipped in, then driving off, didn;t result in the usual alarm to tell you the passenger's not done their belt up. I suspect the occupancy mat is gubbed but won't know for sure unless I either change for a new mat or figure out this code...
Time for bed...