Mr Johnson said there is currently “not enough evidence” to warrant tougher action.
On Tuesday, the UK reported at least 90,629 new coronavirus cases and 172 deaths within 28 days of a positive COVID-19 test.
The country also reported 15,363 additional confirmed cases of the Omicron variant, bringing the total number of confirmed Omicron cases to at least 60,508, according to the UK health authority.
In a pre-recorded statement posted on his Twitter account, Mr Johnson said, “Given the ongoing uncertainty about several things – the severity of Omicron, the uncertainty about the hospitalization rate, or the impact of the vaccine launch or the boosters I don’t believe today that there is enough evidence to justify tougher action before Christmas. “
However, he did not rule out further measures after Christmas, but added: “Should the situation worsen, we are ready to intervene if necessary”.
Scotland is effectively barring viewers from professional football matches and is canceling Edinburgh’s grand New Year celebration under tighter restrictions to slow the spread of the Omicron variant.
First Minister Nicola Sturgeon says public events will be limited to 200 people indoors and 500 people outdoors for three weeks from December 26th. She said that this means that professional sport will be “effective without a spectator”.
It also marks the cancellation of a second year of Hogmanay, Edinburgh’s New Years Eve street party.
Ms. Sturgeon says social distancing and table service only rules will return to licensed bars and restaurants on December 27th.
Ms Sturgeon told Scottish MPs: “Although it may not feel like it, we are in a much stronger position than last year”.
The four parts of the United Kingdom – England, Scotland, Wales and Northern Ireland – have their own health guidelines and have slightly different restrictions.