Yes, that was me after going to a funeral. It’s perhaps not strictly accurate (some vehicles following the hearse are also allowed, but definitely not the whole cortege). I think every crematorium has an arrangement like this in the UK, so probably should be used more widely. For instance this one probably has the restriction. Unfortunately, funerals never lend themselves to much ad hoc mapping.
If I can find a photo or two of the restrictions I’ll create a wiki page (it so happens I expect to be at the second location in the near future).