News of the trial events comes as senior Tories among a cross-party group have declared they will oppose the use of vaccine certificates, with 72 MPs signing a pledge to oppose the “divisive and discriminatory” scheme. Some have described their use as the creation of “checkpoint Britain”. A government scientific adviser has also warned that they could give people a false sense of security.

The size of the rebellion could create problems for the government, should it conclude that legislation is needed to introduce Covid passports