Thousands of people are spending the bank holiday weekend taking part in a gruelling 12 mile mud race in the Northamptonshire countryside.
The Tough Mudder event at Boughton House near Kettering is designed by the British Special Forces and certainly not for the fainthearted!
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Very warm with sunshine. Chance of thundery showers late morning.
A hot, humid and sunny start before cloud increases as a narrow band of thunderstorms spreads northeast. These clear during the afternoon.
A fine and sunny end to Friday will then be followed by a warm and muggy night. Warm and sunny on Saturday with the risk of a thunderstorm.