hey dazzer.
I had the same lights about a month ago or so. did the pedal dance and the code came back as 2135 throttle position sensor.
was accelerating in 2nd when the same lights as your describing came on and car went into limp mode. got her home in the end. got the code and then reset the eml light since she seemed ok.
been fine ever since including a long run to Cornwall and back.
Would be good to know what the error code is.