The number of babies and toddlers in hospital with Covid doubled in a week in England.
In the week up to January 1, there were 509 infants aged 0-5 in hospital. This was up from 255 in the previous week to December 25.
Of those aged between six and 17 years old figures showed in the week up to January 1, there were 269 in hospital. This was up from the previous week which saw 215 youngsters of this age range hospitalised.
Boris Johnson on Tuesday suggested he is set to stick with Plan B measures in England amid increasing numbers of Covid cases, concerns over the return of schools and hospitals possibly becoming overwhelmed.
Other nations in the UK have tougher restrictions in place.
NHS England said a total of 15,044 people were in hospital with Covid-19 as of 8am on January 4, up 58% from a week earlier and the highest number since February 18.
Boris Johnson said during Tuesday's Downing Street press conference that the latest record Covid case figures showed that those who believed the pandemic to be over were "profoundly wrong".
The Prime Minister said there is a "good chance" he will not impose fresh restrictions as he backed sticking with Plan B measures.
England has the most relaxed rules in the UK, with Covid passes for entry into nightclubs and other venues.
Face coverings are compulsory in most indoor public settings, as well as on public transport, and people have been told to work from home if they can, which is similar for the other countries.
Nightclubs have been shut in Scotland, Northern Ireland and Wales.
If a person in England, Wales or Northern Ireland has tested positive or has symptoms, they can stop self-isolating after seven days instead of 10 if they receive two negative lateral flow test results on days six and seven.
