You were on the money Sleeves.
One of the front coil wire spade connections had come loose and was only just touching the coil terminal.
I think that slight movement in the loom when the bars were turned may have worked on the coil wire connection.
I could see that the loom had been moved and was not in the best position to reduce movement.
I installed a cable tie to hold the coil wires and repositioned the loom.
The lights gone out and all is sweet again.
My tunecu cable however has been ordered and is on the way