Finally,after months and months (and miles and miles), I've sorted out the air bag light. Got a couple of resistors pre-made off eBay and fitted them up. Initially, fitted them wrong and got a second error message about there being a short to the earth wire, so battery back off, switched it up and then re-cleared the faults and done.
Also finally put on my first in the UK sticker;
Slowly getting through the list of things that "need" (read "want") to get done.