Thanks for the replies

The accident damage (bike not stolen) resulted in a bit of dash damage, bent key, digital dash complete but mounting bolts broken and some damage to the ignition lock surround. It's only a sheepish ding in the plastic body but I guess that could be the problem....
I've seen the immobiliser emulator replacement things on eBay but my bike is a 2005 and they say they're 2006-2009.
Manual
Shows 6 wires going to immobiliser, the eBay product shows 4....

I'll pull mine apart to see what's there in reality.
I checked the fuses and they're all good.
Wiring to ECU a bit chaffed (not from accident, looks like the side panel has been rubbing for a while). I can see the worst damage to this wiring is a brown wire but the manual doesn't show a brown wire.

I'm bored of this already!! Any ideas?

Thanks again