Rail operator, First Great Western said:
We are still able to operate services between Oxford and Didcot Parkway, however we have had to reduce the number of services in operation and journey times will be extended, therefore an amended train service is in operation on this route.
Services between Bristol Parkway and Swindon. The line between Bristol Parkway and Swindon has also been affected by flooding. Services from Swindon will be diverted via an alternative route, which will mean extended journey times and services from South Wales will be subject to speed restrictions near Bristol Parkway.
More top news
This year's Pride in London event will include a minute's silence to commemorate the victims of the Orlando shooting.
The London property market is expected to be the hardest hit as buyers sit it out to see how the economy will be affected.
The former London mayor paid tribute to David Cameron just hours after the Prime Minister announced his resignation.