Just looked through my latest GASCO Flight Saftey Mag Spring 2011 and in the safety notices I read the following
High Visibility Clothing Concerns
At a meeting last autumn of the National Council of the Light Aircraft Association, concern was expressed about the propensity of high visibilty tabards and jackets, which are made from synthetic materials, to generate static electricity. For this reason, it is thought unwise to wear one of these garments in a refuelling area. Advice also exists about not wearing clothing made from synthetic materials while flying because of the risk of the material burning fiercely in a conflagration following a crash. There is also a risk of reflective materials causing problems with the reflections from the winsshield when flying at night. There is no UK legal or regulatory requirement to wear these garments although some airfield operators require them as a percieved airside safety measure. Some airfields in France, and possibly elsewhere, restrict the wearing of these garments to functionaries of the airfield and ask pilots to remove theirs.
Can you believe it, I knew I'd read it somewhere.
