People stranded in heavy traffic for hours following a serious crash between a van and lorry on the M25 are being treated for heat related illnesses in the highest June temperatures for decades.

South East Coast Ambulance Service (Secamb) said it had responded to a number of patients between junctions six and seven on the M25, near Godstone, as a section of the motorway was closed and a man was airlifted to hospital.

Crews said they are prioritising the most serious cases as the long queues are making it difficult to reach patients.

A spokesperson said the congestion had been "severe and prolonged" with some vehicles stationary for hours during the red heat alert.

"This has resulted in a number of calls from people suffering from heat related illnesses including a number of coach passengers," they said.

People took to social media to ask for help from the emergency services.

One woman posted on Facebook: "My parents have been stuck on the M25 for over 4.5 hours, no information, no supplies.

"There are elderly people, babies, animals, people with health conditions out there on the tarmac in the middle of a red heat warning on the hottest June day for 50 years!

"Can the police not coordinate some water and assistance? The exits are taking hours!"

Another posted: "My nan and grandad both in there 70s have been there 7hours & also haven't been told anything.

"You would think they would have to give water out in this heat! Just had another 3 ambulances go past them so thinking maybe people are getting ill in the heat now. It's awful".

Another replied: "My parents also in their 70s. They say ambulances have been trying to get through but no hard shoulder! People lying on the ground unwell. No info or support!"