The programme of work will allow engineers to safely carry out track renewal, drainage works and vegetation management to keep vital North Wales services running reliably during bad weather.
The line will be closed from 23:00 on Saturday 6 December until 0600 on Monday 8 December, giving engineers uninterrupted access to complete a series of drainage, vegetation management and track renewal activities.
Buses will replace trains all day on Sunday 7 December between Llandudno and Llandudno Junction/Blaenau Ffestiniog, and passengers are advised to check their journey before travelling at nationalrail.co.uk.
Work taking place this weekend
From 23:00 Saturday to 06:00 Monday, engineers will carry out:
- Drainage work at Flint (Saturday night – 8.30am Sunday)
- Vegetation and flailing work from Tyn-y-Morfa level crossing to Llandudno Junction (Saturday – 8.30am Sunday)
- Drainage improvements at Mochdre station (Saturday – 8.30am Sunday)
- Track component renewal at Llandudno Junction (8.30am Sunday – 4am Monday)
This programme of work will help reduce flooding, improve track condition and maintain safe, reliable journeys for passengers.
Further signalling upgrade work later this winter
In addition to this weekend’s closure, Network Rail will continue a wider programme of essential signalling renewals between Llandudno Junction and Bangor across several weekends between December 2025 and February 2026.
Trains will continue to run during this time so that passengers can still make their journeys with minimal disruption.
Scheduled dates:
| Date | Time |
| Saturday 13 December – Sunday 14 December | 23:00 – 06:00 |
| Saturday 3 January – Sunday 4 January | 23:00 – 09:00 |
| Saturday 10 January – Sunday 11 January | 23:00 – 09:00 |
| Saturday 17 January – Sunday 18 January | 23:00 – 09:00 |
| Saturday 24 January – Sunday 25 January | 23:00 – 09:00 |
| Saturday 31 January – Sunday 1 February | 23:00 – 09:00 |
| Saturday 7 February – Sunday 8 February | 23:00 – 09:00 |
Some work must take place overnight or during weekend closures when fewer trains are running, and teams will work hard to minimise noise and disruption where possible.
Passengers travelling during the affected dates should:
- Plan ahead and check before travelling at nationalrail.co.uk.
- Allow extra time for journeys where rail replacement buses are in operation.
Image credit: Network Rail
