If, as is expected, Boris Johnson becomes the new Prime Minister this week, he will find himself engaged in a political fire-fight almost before he has even got his feet under the desk at 10 Downing Street.

The total number of arrests connected to the terror attack rose to 10 when a man was detained in the Moss Side area of Manchester in the early hours of the morning.

Eight men are in custody in connection with Monday's atrocity, with police and security agencies working at pace amid fears of further attacks.