The government’s proposals to ease all remaining restrictions on 21 June is to be delayed by four weeks, Prime Minister Boris Johnson is expected to announce later today (14 June).

In a press conference to be held at Downing Street this evening he is due to set out the details of the delay which is being put in place in order to try and hit the target of offering all adults at least one dose of the vaccination by the end of next month.

Johnson has repeatedly said that when all restrictions are relaxed, the process must be an irreversible one in order to avoid any future lockdowns.

The four-week delay was signed off by a group of senior ministers — Johnson, Rishi Sunak, the chancellor, Michael Gove, the Cabinet Office minister, and Matt Hancock, the health secretary — after a briefing by Chris Whitty, the chief medical officer for England, and Sir Patrick Vallance, the chief scientific adviser.

However the are some concerns within government that the revised unlocking date of 19 July could slip further if hospital admissions continued to rise.

Dominic Raab, the foreign secretary, told Times Radio he could not provide an “absolute guarantee” that lockdown restrictions would be eased by the new deadline. Asked if there was confidence that restrictions could be lifted by August, Raab said: “I don’t think there are any absolute guarantees.”

Commenting on the expected delay, Sacha Lord said: ”If this leak is confirmed by the Prime Minister on Monday, it’s imperative we’re given immediate clarity on the ongoing financial support to be offered during the period of delay. We know nine in ten venues have already made commitments reliant on the 21 June date, whether that’s taking staff off furlough or ordering in stock, and these owners will now be under severe pressure.

”In addition to delaying the furlough repayments and rent moratoriums, I am looking to the Chancellor to commit to a long-term extension of the 5% VAT reduction for the night time sector, extending the rate to include alcohol rather than just food and allowing all hospitality venues equal footing to survive.”