The PM says the government will proceed with “maximum caution” when considering easing coronavirus restrictions.
Boris Johnson is due to announce plans for England’s lockdown on Sunday, but ministers have insisted short term changes to measures will be “modest”.
At the government’s daily briefing, Foreign Secretary Dominic Raab described media reports on easing restrictions as “not a reliable guide”.
He added that changes may vary between the different nations.
It comes after Scotland’s lockdown was formally extended, and the Welsh government warned media reports speculating how Mr Johnson might ease lockdown measures risked sending “mixed messages” to the public.
Some newspapers suggested the rules on exercise could be relaxed and more people encouraged to return to work.
Scotland, Wales and Northern Ireland have the power to diverge from what the government at Westminster decides on the lockdown – and could lift restrictions at a different rate.