Passengers are being advised to plan ahead later this month as Network Rail carries out essential upgrades to Gloucester signal box, replacing more than 10,000 wires to improve reliability for rail users.

The multi-million project will take place from Saturday 27 September to Sunday 5 October, during which 12 miles of wiring will be replaced. The signal box, which has controlled services across Bristol, Worcester, Swindon and south Wales since the late 1960s, is being modernised to ensure trains continue running safely and efficiently in the future.

While the work is completed, no trains will be able to stop at or travel through Gloucester station, with replacement bus services operating across the region.

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Dates and routes affected:

• Saturday 27 – Sunday 28 September & Saturday 4 – Sunday 5 October

• Cheltenham Spa – Gloucester – Lydney

• Worcester Foregate Street – Gloucester

• Cheltenham Spa/Gloucester – Bristol Parkway

• Cheltenham Spa/Gloucester – Kemble (Saturdays) and Swindon (Sundays)

• Monday 29 September – Friday 3 October

• Cheltenham Spa – Gloucester – Lydney

• Gloucester – Cam and Dursley

• Worcestershire Parkway – Ashchurch for Tewkesbury

• Services between Cheltenham Spa, Bristol Parkway and Swindon will run but will not stop at Gloucester

Network Rail lead portfolio manager Ben Perkins said: "I'd like to thank passengers in advance for their patience as we complete this vital work to modernise and upgrade Gloucester signal box; a key control centre to guide trains through a very busy area.

"Please make sure to check your journey before travelling as we carry out this work, with your train operator or via National Rail Enquiries."