Emergency laws will be rushed through the Parliament to allow police and MI5 to investigate people's mobile phone and internet data.
The new measures will mean phone and internet companies will be required to store data for a year.
More top news
Stories continue to emerge of the heroism and compassion of Tunisians who tried to help in the wake of the Sousse attack.
Thunderstorms continue across parts of northern England and Scotland tonight.
Paddling pools, ice creams and sun hats were among just some of the ways people kept cool during the hottest July day ever recorded.