<<Mind you, some Air Traffickers seem to have no idea about the 'glide clear' rule.>>
Not required to - pilot's responsibility entirely. If I had to write a book about the antics of some light a/c pilots I'd be here all millennium!
A truly helpful comment from the Flying Prevention Branch..... We know. Or rather most of us know; however, wouldn't it be an idea to remind pilots about Rule 5 if you clear them across the middle of London? If the engine failed, would a smart lawyer argue that you aided and abetted the resulting accident?