Late-night trains on the Cotswold Line will be affected by engineering work on Monday, November 29, and Tuesday, November 30.
The following changes will apply:
The 21.50 from London to Worcester will be diverted, calling at Didcot Parkway to set down passengers for a rail connection to Oxford, and then running non-stop to Worcester via Stroud.
The 22.50 from Paddington to Worcestershire Parkway will terminate at Oxford.
The 22.00 from Hereford to London Paddington will terminate at Worcester Shrub Hill and restart from Oxford.
Buses will replace all three trains at stations between Oxford and Worcester.