In Britain, more Muslims join ISIS than join the British army. https://t.co/LQVNz7b2Eb — Donald J. Trump (@realDonaldTrump) December 11, 2015

So Mr Trump is still trying to claim that Britain is dangerously radicalised, to back up his statement that parts of London are dangerous no-go areas.

The article he links to uses as its proof a largely discredited estimate by Khalid Mahmood MP. Last year he guessed there were 1500 British Muslims fighting in Iraq and Syria - three times the Ministry of Defence estimate. At the same time, a freedom of information request revealed there were 560 Muslims serving in the British Army. Plus those that decided not to declare their religion. And that is without considering the RAF or Royal Navy.

So it's only really true if you are prepared to guess the figures.