Terror-related arrests have surged by 68 per cent to a new record high as security services confront an unprecedented threat, new figures reveal.

There were 379 arrests for terrorism-related offences in Great Britain in the year ending June 2017, a rate of more than one a day and the highest number in a year since data collection began in 2001.

The tally includes dozens of individuals held in swoops in the wake of attacks in London and Manchester which contributed to domestic terror arrests increasing five-fold in the year.

It follows an admission by the Home Secretary in June that anti-terror police had been over-stretched by a spate of recent terror attacks.

Amber Rudd ordered an urgent review, adding resources have been "pulled very tightly".

Over 90 per cent of all offences recorded last year by the official Government statistics were related to Islamic fundamentalism, while the majority of those arrested considered themselves to be British.

The number of white people involved in terror arrests rose by 92 per cent and the number of people arrested for domestic terror incidents increased five fold, from 10 to 52.