Around 3,500 suspected terrorists in UK; 400 ISIS-trained fighters are believed to have returned from war zones in Syria and Iraq.

Around 3,500 suspected terrorists in UK; 400 ISIS-trained fighters are believed to have returned from war zones in Syria and Iraq. By Jon Austin.

In 2016 there were 260 terror-related arrests, a drop of eight per cent on the 282 people held in 2015. …

Seventy (25 per cent) of the people arrested in 2015 were white, while 91 (35 per cent) of those held last year were white. …

In November 2015 MI5 boss Andrew Parker revealed security services were monitoring more than 3,000 homegrown Islamist extremists who were suspected of supporting ISIS, Al-Qaeda or other groups and being willing to carry out attacks on the UK.