Despite changing the connectors I couldn't stop the light flickering when it was fitted. So as the weather was so nice today I took a drive up to mstyle in Romford & bought a new set of H8 led markers.
1 hour 40 mins there & back, missed all the traffic at Dartford crossing & the M25 & managed 34mpg
These were much easier to get into the bulb holders than the old ones, hardest part was getting the old LEDs out.
These seem a bit brighter as they have four LEDs as opposed to two, only issues are I couldn't quite get the led bulbs to align 100% with the holes that light up the outer rings & as the old ones they don't turn off when the headlight switch is set to off, not really a a big issue.
I now no longer have side light left & right failure warning every time I start the car, which is nice.