lord frost, has resigned from the government — and among the reasons given were his opposition to vaccine passports and further restrictions. here's our political correspondent, charlotte rose. the reaction to news of the chief brexit negotiator lord frost's resignation came quickly, with members in a whatsapp group of 100 tory mps describing it as very worrying and a disaster. in the images of the messages first broadcast by sky news, the culture secretary, nadine dorries, steps in to defend the prime minister, telling mps to show a bit of loyalty to the person who won an 83—seat majority and delivered brexit. the response — she is removed from the whatsapp group by senior brexiteer steve baker, who says enough is enough. reacting to the news this morning, the health secretary paid tribute to lord frost. i'm sorry to see him go. i think he's been an outstanding public servant. he's done great things for this country, not least in helping to get brexit done but he's resigned out of principle. i think you can see that.