In the wake of terror attacks, we are often urged to carry on ‘as normal’, to not let fear stop us from living our lives.

And carrying on as normal, on British shores anyway, always seems to involve a certain amount of wry humour while facing the bleakest of times. Thus, the Twitter hashtag #BritishThreatLevels was born.

This week’s appalling attack by a suicide bomber at Manchester Arena shocked and horrified the world, targeting as it did a crowd largely comprising children and teenagers. The investigation resulted in the UK’s official terror threat level being raised to ‘critical’, meaning “not only that an attack remains highly likely, but that an attack may be imminent”.

Twitter responds to the new terror threat level in the only way it knows how