NickE92:
As said Pete, if its got a trailer on no need for the wing tops.
I don’t think it’s that simple, if you are Euro spec that is a flat 5th wheel base, 80mm 5th wheel feet and a 90mm trailer neck this is correct because the trailer is almost skimming the tyres; however if you’re UK spec 100mm 5th wheel base, 150mm 5th wheel feet and a 180mm trailer neck there is no way that the trailer could be considered close enough to be acting in lieu of the mudguard tops as stated in the regulations.