Thanks David, and yes I've had the kick-panel out and identified every relay in there, and there's definately nothing with a fuse.
The only relays I couldn't identify were 4 identical small silver cans, that I swapped around just to see if it made any difference. It didn't

I've also renewed every fuse in the fuse box, in case one was related, but still no change to the ABS light.

I've even had my dealer check the ABS and they couldn't find any faults in the sensors, but didn't have old enough equipment to check the ECU or pump.