There are delays of up to 40 minutes on First Great Western trains between London Paddington and Bristol Parkway due to an earlier signalling problem at Southall.
First Great Western advise of delays until around 2pm.
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The rare white rhino calf, named Alan after the park's electrician, is the 4th white rhino to have been born there since it opened in 1970.
The man and woman in their 20s, fell ill after mixing two domestic cleaning products in a bathroom, creating dangerous chlorine gas.
It will be a dry start to the day with sunny spells. However, thicker cloud and rain will arrive from the west during the afternoon.