A tipper lorry, a silver Mitsubishi L200 and a black Range Rover were involved in a collision on the A35 on Sugar Hill close to Bere Regis shortly after 7.25am on Friday 16 April.

The driver of the Mitsubishi – a man in his 70s from the Poole area – sustained serious injuries and was taken to Southampton General Hospital by air ambulance. His condition remains serious, but stable.

The driver of the lorry – a man in his 50s, also from the Poole area – was uninjured.

The driver of the Range Rover – a man in his 50s and from the Curry Rivel area of Somerset – sustained largely minor injuries. Although he was taken to Poole Hospital, he has since been discharged.

Police Constable Jay Griffin, of the traffic unit, said: “We are continuing to carry out enquiries into the full circumstances of the collision.

“I would urge any witnesses to the incident itself, or the manner of driving of the vehicles involved prior to it, who have not spoken to police yet to please come forward.

“I am also keen to hear from anyone who was driving in the area around the relevant time and has dashcam fitted to their vehicle to please check their footage for anything of relevance.”

Anyone with information is asked to contact Dorset Police at www.dorset.police.uk, via email at scit@dorset.pnn.police.uk or by calling 101, quoting occurrence number 55210059277. Alternatively, to stay 100 per cent anonymous, contact the independent charity Crimestoppers online at Crimestoppers-uk.org or call freephone 0800 555 111.