Planned M25 Closures 2025 Calendar. Drivers are facing disruption when a major programme of maintenance and project works gets underway on motorways near watford in 2025. There will be a number of full weekend closures, as well as ongoing overnight closures.

National highways has announced the details of the third planned closure of the m25 this year as part of the £317 million junction 10 improvement scheme. The closure will last an entire.