Covid: No new restrictions in England before Christmas - Boris Johnson
In a video clip released on Tuesday, Mr Johnson said the government couldn't rule out additional restrictions after Christmas and pledged to "do whatever it takes" to protect the health of the nation.
He added that given the ongoing uncertainty over Omicron's severity and the impact of vaccines, there was not enough evidence to justify any tougher measures before Christmas.
He said people can go ahead with their Christmas plans but should exercise caution - and repeated his appeal for everyone to get a booster jab.