M25 Closures Dates 2025 4runner. National highways has revealed that the m25 will be fully closed for a further two weekends in 2025 after being closed fully for the first time this year. The next set of slip road closures are due to take place between 1 and 4 november.
However, the upcoming closure will impact a different section of the m25. We need overnight closures at the following locations.