We’d like to inform you about upcoming closures around the M25 and A3 that may affect your journeys during May 2025. Please plan your routes in advance to avoid delays.
Closure Schedule:
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Monday 12 May to Thursday 15 May 2025 (Overnight Closures)
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Full closure of the M25/A3 Junction 10 gyratory, including all entry and exit slip roads, from 10pm to 5:30am (Mon-Thurs) and 11pm to 6am (Fri-Sat).
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The M25 and A3 will remain open for through traffic.
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Roundabouts and slip roads will be closed — access to or from the M25 and A3 at this junction will not be possible.
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Friday 16 May to Monday 19 May 2025 (Weekend Closure)
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Full closure of the Junction 10 gyratory from 9pm on Friday to 5:30am on Monday.
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Diversion routes remain the same as during the overnight closures.
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Monday 19 May to Thursday 22 May 2025 (Overnight Closures)
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Another four nights of full gyratory closure for technology upgrades and resurfacing.
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Diversion details as listed below.
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Tuesday 20 May to Tuesday 27 May 2025 (Lane Closure)
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The northbound A3 between Junction 10 and Painshill will have its offside lane closed 24/7 for drainage works.
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The A3 will stay open, but lane closures may cause some delays.
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Diversion Routes:
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M25 Eastbound (anticlockwise) to A3 North or South:
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Exit M25 at J11 → A320 → A245 → Rejoin A3 at Painshill Junction.
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M25 Westbound (clockwise) to A3 North:
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Exit M25 at J9 → A243 → A309 → A307 → A245 → Painshill Junction → A3 Northbound.
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M25 Westbound to A3 South:
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Exit M25 at J9 → A24 → A246 → A247 → Rejoin A3 South at Send Junction.
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A3 Southbound to M25 Westbound:
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Exit A3 at Painshill → A245 → A320 → Rejoin M25 at J11.
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A3 Southbound to M25 Eastbound:
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Exit A3 at Painshill → A245 → A307 → A309 → A243 → Rejoin M25 at J9.
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A3 Northbound to M25 Westbound:
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Exit A3 at B2215 (Send) → A247 → B382 → A245 → A320 → Rejoin M25 at J11.
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A3 Northbound to M25 Eastbound:
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Exit A3 at B2215 (Send) → A247 → A246 → A24 → A243 → Rejoin M25 at J9.
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Please Note:
Delays are possible on these diversion routes, so we recommend checking traffic updates and allowing extra time for your journey.