Covid live: Pfizer launches Omicron vaccine trial; UK reports highest daily deaths since February

Company hopes vaccine will be ready for approval by March; UK reports 439 deaths and more than nearly 95,000 cases

• Boris Johnson braces for release of Sue Gray's report
• Scotland to relax strict work-from-home guidance from Monday
• Long Covid: doctors find antibody signature' for patients most at risk
• Met police investigating Downing Street parties, says Cressida Dick
• UK Covid and Boris Johnson developments - live

The UK's transport secretary Grant Shapps is on Sky News - he has been championing the government's decision to drop Covid testing and quarantine requirements for international travel from 11 February, which he pointed out was in time for half-term holidays in England. He said:

It's been a long time coming, but when you go abroad there are no more tests to take when you come home. So you don't need to take a test before you leave, wherever you're coming from, to get here. You don't need to take a day two test, it's already gone. You can just come home, and the only thing we ask you to do is fill in a passenger locator form, which we are going to simplify. That's it. No quarantine. No testing. And all that cost would fall away.

A couple of other small things, including children 12 to 15 being able to use the NHS Covid app to demonstrate that they've been vaccinated. That's where countries require that. And under-eighteens are exempt anyway. It's going to be a big change, much cheaper, and I'm really delighted.