All schools in England are expected to reopen on 8 March as part of the prime minister's "cautious" four-part plan to lift the coronavirus lockdown.
Boris Johnson will share his finalised road map with ministers later, before unveiling it to MPs and then leading a news conference at 19:00 GMT.
It is understood that up to six people or two households will be allowed to meet outdoors from 29 March.
Rules will be lifted in phases and four conditions must be met at each stage.
It is understood that the first phase will be split into two parts:
Phase one, part one (from 8 March) - All schools expected to open with outdoor after-school sports and activities allowed. Recreation in a public space - such as a park - could be allowed between two people, meaning they would be allowed to sit down for a coffee, drink or picnic
Phase one, part two (from 29 March) - Outdoor gatherings of either six people or two households are expected be allowed, including in private gardens. Outdoor sports facilities such as tennis or basketball courts could reopen and organised adult and children's sport, such as grassroots football, could also return
Although schools are set to reopen to all pupils on 8 March, it is thought a few days' flexibility may be built in to allow measures like testing to be put in place.