A record 400 terrorism-related arrests were made in Great Britain in the year ending September 2017, new figures show.
The numbers, from the Home Office, were the highest since data began to be collected in 2001 - and a 54 per cent rise compared with the previous 12 months.
The Home Office said the increase was partly due to the large number of arrests made following a string of terrorist attacks on UK soil.
- Westminster attack: 12 arrests
- Manchester: 23
- London Bridge: 21
- Finsbury Park: 1
- Parsons Green: 7
Of the 400 arrests made over the year, 115 - or nine per cent - resulted in a charge.
The figures, revealed in a statistical bulletin, also show that around 53 per cent (213) were released without charge, 15 per cent (60) were released on bail pending further investigation, three per cent (11) faced "alternative action".
One case was still pending, the bulletin added.
Meanwhile, the Foreign Secretary used a speech at the Foreign Office to address the threat of Islamist terrorism.
Boris Johnson said Islamic extremism has been compared to "crack cocaine".
He added: "In this country MI5 and counter terrorism policing are now running well over 500 live operations - a third more than last year."
And newly-appointed Defence Secretary Gavin Williamson argued in the Daily Mail that British citizens who fight for Islamic State should not be allowed back into the UK.