Brit grandad made last heartbreaking call after vanishing in Jamaica as son begs for drones to be launched to find him

THE son of a British grandad who vanished just two days into his Jamaica holiday has told of the last heartbreaking call his dad made.

Robert Dyer, 60, was out walking in thick woodland Sunday two days after landing on the Caribbean island when he disappeared.

The dad-of-three, who recently retired as a personal trainer, made frantic calls to his brother after realising he was lost in the hilly terrain of Ballards Valley in St Elizabeth.

Robert's brother Henry, who he was staying with, desperately tried to direct him, but he was unable to find his way.

His son Lewis said his dad, who lives in London, then became disorientated as dehydration set in.

Lewis told The Sun: "The next day, we were unable to contact him.

"My mum then managed to get through and speak to him.

"He was lying in a ditch somewhere with no water and couldn't speak properly and had become immobile."

Lewis said his family have not been able to get through to his dad since the last call to his wife Anne, who he has been married to for 36 years.

Hundreds of people in the area have now joined cops in a hunt for Robert, whose family are becoming increasingly worried.

Lewis added: "As each hour passes, we are losing hope.

"We don't know if he's still alive. It's so surreal.

"Every hour that passes is lowering our chances of actually finding him."

Lewis is now hoping a fire department or someone with a drone that has thermal imaging will step in to help locate his dad.

He added: "Our priority now is to get drones with thermal imaging down there, it's already been days with hundreds of people searching, we need a better way.

"There must be a nearby British base with drones, or even a private company willing to help

"We are pinning our hopes on this. At night time we are useless, but with a drone at least we can still work at night."

Robert had planned to stay with his brother for four weeks, having recently given up work following a cancer battle.

Lewis said: "He's 100 per cent a family man. He's for his family."

Acting superintendent of St Elizabeth Police Division Coolrigde Minto said a huge search was continuing to find Robert.

He said: "There is in fact a search and rescue operation ongoing at this time, which is in response to a British national who got lost in the hilly terrain of the Ballards Valley area.

"He was unable to locate his way back to the home where he is staying."

Supt Minto said the search party has already combed several miles of hilly terrain, with helicopters also deployed.