There were 52 new admissions in the seven days to June 12, up from 32 the previous week.
And every region of England is now seeing increasing numbers of people being admitted to hospital with Covid-19, official figures show.
The steepest rise was seen in the North West, where 741 people were admitted in the week to 14 June, up 55 per cent from the previous week.
The North West also has the highest rate of hospitalisations, at 10.5 per 100,000 people.
In the North East and Yorkshire, Covid hospital admissions rose by 30 per cent in the same period.
Most cases in the UK are still caused by the Omicron BA2 variant, originally dubbed ‘Stealth Omicron’, UK Health Security Agency (UKHSA) data shows
But health chiefs are monitoring the impact of the variants Omicron BA.4 and Omicron BA.5, which were designated variants of concern in the UK on May 20.
Dr Mary Ramsay, Director of Clinical Programmes at the UKHSA, said: “After a period of low case rates, we are now seeing increases in outbreaks within care homes and in hospitalisations among those aged 80 years and over.
“It is encouraging that we are not seeing an increase in intensive care unit (ICU) admissions but we are monitoring data closely and assessing the possible impact of subvariants BA.4 and BA.5.
“As we enter summer, it’s still important to remember that Covid-19 has not gone away and to get vaccinated to reduce the risk of becoming seriously ill with the virus. If you’re not yet up to date with your jabs please come forward now – it’s not too late to get protected.
“Remember to observe good hand and respiratory hygiene. It is also sensible to wear a face covering in crowded, enclosed spaces. If you have any symptoms of a respiratory infection, and a high temperature or feel unwell, try to stay at home or away from others – especially elderly or vulnerable people.”