If thats what there called lol, looking to replace the plastic fixing clips that hold the wheel arch linings together as mine are all loose and rattle a lot, theres some on ebay but wondered if anyone knows if they are 8mm or not??

I couldn't tell you mate I use tie wraps if anything comes a bit loose if I can't find a replacement ;) 

if you are looking on ebay look for the ones that give the measurements in the ad to be sure

Heres the sizes given on ebay

To Fit an 8mm Hole

Collar Diameter 20mm

Head Diameter 13mm

I'd be tempted to risk them they're only plastic ones aren't they ? and if they're cheap enough.