ah......and then they came back again.
I had another go at it and discovered there were error codes in the ABS module as well as the ECU.
I cleared both lots of errors via TuneECU and re-booted by disconnecting the battery.
I did a 100 miles yesterday without issue so I think I have cracked it now!
Serves me right for not reading the manual before pressing buttons
The lamps were ABS, ECU and TPMS - indicative of the riding MODE not changing correctly.