Twenty-two people have been killed and 59 injured in what Theresa May called an "appalling, sickening, terrorist attack" at Manchester Arena.

A lone male suicide attacker set off a homemade bomb in the foyer at 22:33 BST on Monday at the end of a concert by the US singer Ariana Grande.

Labour leader Jeremy Corbyn said it was a "terrible and traumatic time" and it was important to "come together".