Keir Starmer has dealt a blow to government hopes of pushing through a domestic Covid passport scheme, expressing scepticism about the idea and saying the “British instinct” could be against them. Ministers are consulting on the possibility of obliging people to show proof of vaccination or a recent negative coronavirus test to access crowded spaces such as pubs or sports events, with Downing Street insisting no decision has been made yet. Starmer also said the government should come up with a policy either way, and not leave the decision to pubs, as mooted by Boris Johnson, saying: “I think this idea that we sort of outsource this to individual landlords is just wrong in principle.” While his stance remains far from categorical, it will buoy libertarian-minded Conservative MPs, who will hope that if Labour opposes domestic vaccine passports – the Lib Dems have already said they will vote against them – the idea could be defeated in parliament. Michael Gove, the Cabinet Office minister who is leading deliberations on the policy, has met a series of MPs over this week before the publication of the interim findings of the panel on vaccine passports, which is due on Monday. Gove is generally seen as a strong supporter of the scheme. But officials and ministers are said to be divided between whether the certification should apply only to mass events, for which there is broad support, or additionally to smaller venues, which is more controversial. The plan is to make the certification available on a modified NHS app, which would detail whether a person has had a vaccination, or a recent test, or has antibodies to the virus, having previously tested positive. Another aspect of the plan being considered is whether making vaccination a condition for pub entry could boost vaccination rates among younger people, when the programme moves to offer them jabs in the coming months.