Extraordinary if true. The police better have a really cast-iron reason for doing so - it's somewhat hard to imagine what that would be, in the case of a former UK ambassador. https://en.m.wikipedia.org/wiki/Craig_Murray
"If that is a crime, send me back to jail."
Well, yes, its been made pretty clear [1] that, this is indeed a crime in the UK. Now whether that is right or wrong, is for a million other people to argue about, but it is a crime.
And, in the replies, many were quick to tag police and cpsuk to let them know.
[1] https://www.independent.co.uk/news/uk/hamas-suella-braverman...