There's disruption on First Great Western services between Gloucester and London Paddington due to a broken down train between Kemble and Swindon.
There are delays of more than 2 hours, with some trains diverting via Bristol Parkway.
Replacement buses are in place between Gloucester and Swindon. There's no current estimate for when a normal service will resume.
More top news
Despite the rumours, Somerset's Jenson Button announced he's staying in Formula 1. We take a look back at how he became World Champion.
The wife of a high-ranking Army officer has called on the Ministry of Defence to ban an anti-malaria drug linked to mental health problems.
It was hyped up as one of the biggest shopping days of the year - but many people stayed away from city centres, going online instead.