Hospitals across the country have been warned to prepare for a second terrorist attack this Bank Holiday weekend.

NHS England has told major trauma centres to “be ready” for an incident and to ensure staff in 27 cities to have access to their major incident plan, as well as carrying identification at all times.

The threat level for a terrorist attack in the UK is at the highest possible level after suicide bomber Salman Abedi detonated a bomb in the foyer of the Manchester Arena at an Ariana Grande concert on Monday.

The blast killed 22 people, including an eight-year-old girl and parents who had been waiting to pick up their teenage children.

Eighteen adults and 14 children are still receiving treatment in Manchester hospitals, which has reportedly put emergency staff under “intense pressure”.

Five adults and five children remain in a critical condition, according to Central Manchester University Hospitals NHS Trust.