I'd rather they didn't have to police something which doesn't have to happen but spent their precious resources keeping us all safe instead.
In which case, I go back to my comments about Trump's visit. We can ask why Theresa May didn't say that due to the number of incidents the Police force have been overstretched and need to be able to rest and recuperate, therefore with regret the visit will have to be postponed, (whilst quietly being jettisoned altogether).
Nope, she didn't say that. Now we have Trump saying he doesn't want to come, but since it's Officially an invitation from the Queen, it gives the Palace the dilemma of having to keep the time of the visit available or slotting some other visit in instead. I don't imagine that Treeza will be flavour of the month up in Buckingham Palace. I bet the Queen will be glad to escape to Balmoral for her holidays.