The 50 page blueprint is said to be Britain’s route out of the coronavirus. The five-stage plan is staggered over the next six months, The Mirror reports.
The Prime Minister will reportedly set out his “roadmap” on Sunday.
Mr Johnson has said the first steps will happen the next day “if we possibly can”.
However, officials fear a second wave of coronavirus or a seasonal flu outbreak this autumn could blow their plans off course.
A Government source told the Mirror: “It’s a bit of a shambles.
“Nobody can quite agree what to do and when to do it. Somebody comes up with a bright idea, but the practicalities get in the way.
“We’re not South Korea.”
If all goes to plan the government will begin to relax certain restrictions as early as Monday, the Mirror reported.
According to the publication, unlimited exercise will be allowed from Monday.
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This will start with Year 6.
Households could also be allowed to expand “social bubble” to meet one other household of family or friends.
By the end of June secondary schools will begin to return before the summer holidays.
Small team sports such as five-a-side football could be allowed at this time, along with outdoor gatherings of fewer than 30 people.
Cafes with outdoor seating could also reopen while outdoor sports like golf, tennis and angling might resume.
Possible return of Premier League matches, although behind closed doors.
By the end of October to the beginning of September pubs, bars and restaurants could gradually reopen.
During this time customers would be expected to follow strict social distancing rules.