At Least 22 Killed in Suicide Bombing at Pop Concert

A blast occurred at the Manchester Arena during an Ariana Grande concert, leading to a police investigation treating it as a terrorist incident. This is considered the deadliest UK attack since the 2005 London bombings. Prime Minister Theresa May is set to chair a COBRA emergency meeting to address the situation.

What was the significance of the incident in relation to previous attacks in the UK?

What time was the COBRA Emergency Committee meeting scheduled?