A full closure of the M27 in both directions between Junctions 9 (Whiteley) and 11 (Fareham), scheduled from
8pm on 24 December 2025 to 4am on Sunday 4 January 2026
The closure is required to put in place a new four-lane wide underpass beneath the M27, using an innovative ‘box slide’ engineering technique. Using this method means that many months of lane restrictions, speed limits, and overnight works can be avoided.
We appreciate that the closure will inevitably cause inconvenience to local communities in the Fareham and Gosport areas and we thank everyone for the patience over this period.
Key information road users need to know during the closure period:
The M27 will be closed completely, in both directions, between Junctions 9 (Whiteley) and 11 (Fareham), from 8pm, 24 December 2025 to 4am on Sunday 4 January 2026.
There will be a signed diversion route in place along the A27, which is mostly two lanes in each direction, during the closure. This route is expected to be busy, particularly between 10am and 4pm every day when drivers should be prepared for extended delays. Road users should aim to plan their journey in advance and consider alternatives including public transport, travelling during less busy times, using different routes, or considering if their journey is really necessary.
Drivers will be able to exit the M27 westbound at Junction 11 for Fareham and Gosport, and eastbound at Junction 9 for Whiteley and Park Gate. However, there will be no westbound entry to the M27 at Junction 11 for traffic heading towards Southampton or the A32 (Alton), and no eastbound entry at Junction 9 for traffic heading towards Portsmouth.
For more information and updates visit the Christmas closure
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