London, Temporary Road Closures Due To Maintenance & Renewal Works

national highways

M1 (JUNCTIONS 1 TO 5) AND M25 (JUNCTIONS 22 TO 25)

MOTORWAYS & A1 TRUNK ROAD

TEMPORARY TRAFFIC RESTRICTIONS

Notice is hereby given that National Highways intends to make Orders on the M1 and M25 Motorways, and A1 Trunk Road, in the County of Hertfordshire and the London Boroughs of Hillingdon, Harrow, Enfield and Barnet, under Sections 14(1)(a), 14(1)(c), and 14(7) of the Road Traffic Regulation Act 1984 because works are proposed to be executed on, or in the vicinity of, the road.

The effect of the Orders in this area would be to:-

1. authorise the overnight closure of -

(a) sections of both carriageways of the M1 between Junction 1 (A406) and Junction 5 (A4008);

(b) sections of both carriageways of the M25 between Junction 22 (A1081) and Junction 25 (A10);

(c) any slip and link road leading to and from the carriageways described in 1. (a) and (b) above;

(d) the entire circulatory systems at M25 Junction 23 (A1(M)/A1) and M25 Junction 25 (A10);

(e) the hard shoulder adjacent to the lengths of carriageway and slip and link roads described in 1. (a) and (b) above; and

(f) any emergency refuge area adjacent to the lengths of carriageway described in 1. (b) above.

2. authorise the overnight closure of –

(a) both carriageways of the A1 between Bignalls Corner (A1(M) Junction 1/M25 Junction 23) and Borehamwood Interchange (A5135), and any slip and link road leading to and from those carriageways;

(b) authorise the overnight closure of any lay-by, bus stop or gap in the central reservation adjacent to the lengths of carriageway described in 2. (a) above; and

(c) authorise the overnight closure of any side road at junction with the lengths of carriageway described in 2. (a) above.

3. authorise the overnight suspension of the Motorway Regulations prohibiting use of the outside lane by HGVs on the lengths of carriageway described in 1. (a) and (b) above.

4. authorise the overnight use of the hard shoulder adjacent to the lengths of carriageway described in 1. (a) and (b), and any slip and link road described in 1. (c), above.

These measures would be in the interests of road safety while contractors undertake maintenance and renewal work of a cyclical nature and M1, M25 and A1 project works.

The duration and scope of each closure or provision above would vary depending on the nature of the maintenance work being undertaken on each occasion. The programme of works would start on or after 2nd January 2026.

There is a process which would extend the below hours on the M1, M25 and the A1 to between 19:00 and 06:00 (maximum period) on any day, subject to traffic counts and the standard local authority permissions.

The overnight closures would otherwise be in operation between:

• Monday – Thursdays: 22:00 – 05:30
• Fridays: 23:00 – 06:00
• Saturdays: 22:00 – 06:00
• Sundays: 22:30 – 05:30

Planned maintenance work would be scheduled to avoid disruption during known peak periods, although essential maintenance may be necessary during these periods to prevent the need for emergency works. Please see National Highways website for specific details on upcoming closures.

The Order would come into force on 2nd January 2026 and remain in force until 24th December 2026.

Traffic affected by the closures would be diverted via other junctions of the M1, M25 and A1, or by using the A1(M), A10, A41, A405, A406, A411, A412, A414, A1081, and the A5183. The diversion in force would vary according to the closure in force, and the roads listed are the agreed routes, but these may change depending on local conditions.

The temporary closures, hard shoulder and HGV outside lane running and diversion routes would be clearly indicated by traffic signs when they are in operation during the works period.

I Rosendaal, an Official of National Highways Ltd.

Ref: NH/SE/2026/M25/RNO, AREA5MWAY/RNO, AREA5TRUNK/RNO

National Highways, (Company No 9346363). Registered Office:

Bridge House, Walnut Tree Close, Guildford, Surrey, GU1 4LZ.

A company registered in England and Wales.

For enquiries, please contact the Customer Contact Centre on 0300 123 5000 or info@nationalhighways.co.uk

www.nationalhighways.co.uk