Boris Johnson wears a 'Get Brexit Done' apron as he ices doughnuts at Golders Green bakery

Earlier, Mr Johnson visited Selig Court, Jewish Care's independent living facility where he met Holocaust survivor Rachel Levy, who told him of "the importance of Holocaust education for future generations", Jewish Care said.

He met with the charity's chairman Steven Lewis and chief executive Daniel Carmel-Brown, who impressed upon him issues around the social care sector.

Mr Carmel-Brown said: "Today’s visit has meant that, during this election campaign, Jewish Care has contributed its voice to that of the wider care sector, which remains deeply concerned about the lack of progress on issues that affect us, including the need for a long-term plan for funding social care.

"We know that the Jewish community cares about a broad range of issues and it is important that those who use Jewish Care services have been able to explain these concerns to parliamentary candidates.”

His visit follows a visit by former PM Theresa May who went to campaign with Mr Freer last month.

Mr Freer is defending a small 1,600 majority over Labour but the party's antisemitism crisis and the high profile of Lib Dem candidate Luciana Berger has made the result in the seat, where a fifth of voters are Jewish, harder to predict.