Driving out for sunday lunch about 50 mph ..sudden vibration lasting 2 seconds and then yellow light and restricted performance......
Struggled home without the message but she was not happy.
Next day running rough ,hunting and vibrating...Codes say No 8 which is in the worst location but discovered coil loose and much oil in the plug hole.
Extracted the plug with magnets on the end of a bit of welding wire ,cleaned it all up and its all good. New seals for under the cam cover ordered.

Welding wire ,magnets and some heat shrink to lift out the plugs
Though I had dropped a valve seat but we leave that for another time.