Temperatures will soar to 35 degrees today - and that means problems for commuters. 

Great Western Railways will be running a 'reduced' service after midday. Those attempting to use its services to get into and out of Oxford should check before travelling. 

Speed restrictions between Oxford and Paddington are likely to be in place and so the number of long-distance train services is likely to be cut. 

GWR managing director Mark Hopwood said: “Speed restrictions will be put in place on our network, but the extent of those restrictions can only be determined by conditions on the ground and are likely to change throughout the day.

“We will continue to run as many trains as we can but those travelling should be aware that we will have to reduce the number of trains we can run, journey times will take longer, and those trains we can run will be much busier

“Please do heed the usual advice to travel with water, and if you hold a ticket for tomorrow and would like to travel on Friday, we have eased restrictions so that you are able to do so.”

Chiltern Railways took to twitter to warn: “High temperatures mean there will be speed restrictions, delays and changes to some journeys from midday until the evening.” 

Rail users should check before travelling.