Investigators had not identified a cause after a Royal Navy Merlin Mk4 came down in a Devon field, killing three service members during training. The Civil Aviation Authority indicated that specialist investigators from the DAIB would examine the accident. Devon and Cornwall Police were separately continuing their work on its circumstances. Accounts from nearby residents about unusual mechanical sounds and very low flight remained witness observations, not official findings.
Emergency crews were alerted at approximately 03:45 BST to Sourton Down, close to Okehampton. Seven fire appliances drawn from six stations were dispatched, joining police, Navy representatives and aviation personnel. The response closed the A386 from the A30 junction at Sourton Down to Fowley Cross on the A3079. It reopened around 13:30, although the A30’s eastbound exit slip remained unavailable then.
The Navy notified the relatives of those who died and honored their request for a pause before releasing further particulars. Their names consequently were absent from the initial account. General Sir Gwyn Jenkins, the naval chief, confirmed the model involved and expressed sympathy to the victims’ families, friends and service colleagues.
National leaders and the Royal Family also responded. Condolences came from both Downing Street, through Sir Keir Starmer, and the defence ministry, through John Healey. In her Fleet Air Arm ceremonial role, the Princess of Wales said she and Prince William held the personnel’s loved ones in mind.
Merlin Mk4 aircraft operate from RNAS Yeovilton in Somerset as part of the Commando Helicopter Force, whose 25 helicopters support the Royal Marines. The crash site sits near Okehampton battle camp, previously used by Commando crews for Merlin instruction. North Dartmoor also lies between Yeovilton and RNAS Culdrose in Cornwall, and military aviation training is common around the area.
The broader Merlin fleet has served the Royal Navy since 1999. Alongside the Mk4, it includes the Mk2 anti-submarine variant stationed at Culdrose. The type’s recent history includes a September 2024 training accident in the Channel in which a Mk4 ditched and Lieutenant Rhodri Leyshon died. That earlier loss did not establish anything about the cause of the Devon event.
Residents described being awakened as a helicopter crossed the valley at a height they considered abnormal. One person recalled noises suggesting mechanical difficulty; another emphasized that low-flying military aircraft are regularly seen locally but that this flight sounded especially close. Such testimony may inform the inquiry, though technical evidence and formal analysis will determine its weight.
For the moment, the confirmed account is limited: a routine exercise ended in a fatal crash near Okehampton, three naval personnel lost their lives, and a multi-agency investigation followed. Establishing why the aircraft descended is now the responsibility of specialist investigators, while the Navy gives the bereaved space before disclosing identities or additional details.
