Front brake only - is it legal?

Pretend to phone 999 and claim that there's someone here "Impersonating a Police Officer".

I pulled this gag on the two Community Support Officers that tried to stop me for riding on a clearly signed shared use pavement after cycling across a Toucan crossing.

When they, understandably, had a sense of humour failure and started getting shirty I just cycled off knowing that they wouldn't be able to catch me.

This exact thing happened to me. They talked to me like I was scum aswell, I was crawling along on a 10 metre wide boulevard which was completely empty.