There's disruption on First Great Western trains between Bristol Temple Meads and London Paddington due to a signalling problem between Chippenham and Swindon.
Cancellations and delays of up to 30 minutes can be expected.
Some services are diverting and not calling at Bath Spa and Chippenham. First Great Western is looking to source replacement road transport for passengers at these stations.
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Lots of sunshine tomorrow in the West with light winds keeping temperatures warm if not hot.