The UK coronavirus death toll has risen by 381 to 1,789, the Department of Health said - and the latest fatalities include a previously healthy teenager.
The figure is up from 1,408 the day before and as of 9am on Tuesday, a total of 143,186 people have been tested, with 25,150 testing positive.
A 19-year-old with no underlying health conditions became one of the latest victims of Covid-19 in England.
NHS England said the patients who died in hospital were aged between 19 to 98 and all but 28 had underlying health conditions.
In Scotland, a further 13 people have died from Covid-19, bringing the total to 60.
While in Wales the death toll rises by seven to 69 and in Northern Ireland the death toll rises by six to 28, the Public Health Agency (PHA) said.
ITV News' Health and Social Affairs Correspondent Emily Morgan explains how the deaths are calculated - and why there is a discrepancy
Figures from the Office for National Statistics (ONS) have been different to that of NHS England and Public Health Wales.
The ONS figures - which are provisional - are based on the number of deaths registered in England and Wales where Covid-19 was mentioned on the death certificate as "deaths involving Covid-19".
In contrast, figures published by NHS England and Public Health Wales are for deaths only among hospital patients who have tested positive for the virus.
The latest figures report 25,150 people across the UK have now tested positive for the virus.
It comes as the Government said it had been difficult to increase Covid-19 testing and admitted "we must go further, faster" to increase availability.
At Tuesday's daily coronavirus briefing, Cabinet minister Michael Gove said: "More NHS staff are returning to the frontline, and more testing is taking place to help those self-isolating come back, and to protect those working so hard in our hospitals and in social care."
He said a "critical constraint" on the ability to rapidly increase testing capacity is the availability of the chemical reagents, but added the Prime Minister and Health Secretary were working with companies worldwide to ensure the UK gets the material needed to increase tests "of all kind".
The Cabinet minister added that "the first of thousands of ventilators" will be delivered to the NHS next week. It comes as a consortium of manufacturers joined forces to build 10,000 ventilators to meet the demands of the crisis.
Mr Gove said the Government was also "buying more ventilators from abroad, including from EU nations".
Also addressing the presser, NHS England's Medical Director warned it is important the public "must not be complacent" despite a plateau in new cases in recent days.
Stephen Powis said "it's really important not to read too much into this," adding: "It's really important we keep complying with those [lockdown] instructions".
Coronavirus: Everything you need to know