Wrtl Vectras are a white street light but the back part is grey. Their white canopy is made from GRP.

M25

This is the only example I know of, on the m25. The rest of the lanterns nearby are Urbis z3s. The Philips iridium next to it is Dayburning, most likely they both run 400w SON.

Staines

This WRTL vectra is in Staines. It has a bowl and has quite a clean canopy.

Here is the base of the very thick column. It has 2 doors.