The Government is due to publish a report, prepared by Network Rail and management consultancy Atkins, setting out the case for the HS2 high-speed rail project.
This is believed to have concluded that there would have to be 2,770 weekend closures - totalling 144,000 hours of work - on the East Coast, West Coast and Midland main lines if it was to replace the intended capacity of HS2.
The study warns that, during a typical weekend, the journey time from London to Leeds could more than double from two hours 10 minutes to more than four-and-a-half hours.
More top news
Authorities say Ai Weiwei failed to disclose a previous "criminal conviction" - though his supporters say he was never even charged.
The supermarket made the change after getting feedback from customers who said they felt under pressure as they finished their shop.
Harry Potter fans have been left sorely disappointed after the slightly misleading hashtag #NewHarryPotterBooks began trending on Twitter.