THE son of a newly-widowed missing pensioner has said his family are desperate for their dad to come home.

Tommy Lamb's father Thomas Lamb vanished on Saturday after making movements his son said "made no sense".

The grandfather-of-five, who has three granddaughters and two grandsons, has never been away from home overnight before and concerns are growing for him.

Tommy said: "We're so tired but we're just trying to get on with things. My brother and I are holding ourselves together but my sister and niece are struggling.

Read more: Missing Cumbernauld pensioner Thomas Lamb sighting in Partick

"This is like the sort of thing you see on American TV dramas. It's something that happens to other people.

"We just can't believe our dad is missing but we're trying our best to get through it and bring him home."

Thomas was said to have been upset following the recent and sudden death of his wife, Jean, from cancer.

Jean, 74, was diagnosed last year and, although she seemed to be doing well at first, was found slumped at home unconscious.

It was found that the cancer had spread to her brain and there was nothing doctors could do to help her.

She died six days later.

Read more: Palacerigg Country Park woodland searched in hunt for missing Cumbernauld pensioner Thomas Lamb

Tommy said: "My mum's funeral was last Thursday and my dad was a bit down, understandably. He was a quiet man so those outside the family might not have noticed but because we know him so well we could see he was upset and not quite himself.

"He and my mum were a close couple and they had lived in that house for their whole marriage.

"It must have been hard for him being there surrounded by her things and all those memories."

Thomas, was last seen in his hometown of Abronhill, Cumbernauld, on Saturday.

The 79-year-old was last spotted at 6.25pm on Oak Road in Abronhill shortly before he was seen at 6.30pm walking along the track at Lime Crescent towards Forrest Road.

Police Scotland released a CCTV image of him in Teviot Walk at around 6pm on Saturday evening.

He was seen outside the Carrickstone Bar talking to someone before making his way through the shopping centre. He then is seen leaving the shopping centre at the old bus station.

Thomas, dad also to Stephen, 45, and Margaret Anne, 43, was then seen boarding a Stagecoach X25 bus in Cumbernauld town centre around 6.10pm before getting off on Moss Road near to Oak Road at 6.23pm.

Tommy said his dad had taken the bus in to Glasgow City Centre earlier in the day where he was seen having a pint in a pub around 11.30am.

His movements then aren't known until he boarded a 3.30pm bus in Buchanan Bus Station to take him home to Cumbernauld.

He stopped for two half pints in the Carrick Stone before catching another bus to head home.

Tommy said: "My dad took the bus home but was seen walking right past the house. He then bumped into a neighbour who stopped him for a chat, saying how sorry he was about Jean.

"The neighbour said he was going to the town centre and could he get my dad anything.

"Then, even though he had just come from the town, my dad said that sounded like a good idea and Davie, the neighbour, gave him a lift back to the town centre.

"He then walked off towards local woodland.

"It doesn't make any sense. It's really strange. A complete mystery why he would do that."

Tommy said his dad's bus pass has not been used since Saturday and he had £100 in his wallet.

An appeal on Facebook has helped piece together Thomas's last known movement and Tommy said he is incredibly grateful to everyone who has come forward.

More than 100 local volunteer searchers, who have been out every day, have been joined by four members of the Trossachs Search and Rescue team, who are working the area with sniffer dogs.

Tommy says the response from the local community has been "phenomenal".

He added: "I'd also ask that if anyone thinks they see my dad, could they take his photo, please? Everyone has a camera phone these days and it would help the police to know if it's my dad or not."

Thomas and Jean met in a bar in Glasgow in 1967 and were inseparable afterwards.

They lived in the same Abronhill home for the 48 years of their marriage.

Thomas had been a roofer and Tommy says his dad "worked on nearly every roof in Cumbernauld" as well as being known for his work around Scotland.

The 79-year-old liked to keep busy and was a daily sight in Abronhill walking to the local paper shop with his distinctive shuffling walk.

Mr Lamb is around 5ft 8ins with grey hair a slim build.

It is believed the pensioner was wearing a black anorak, multicoloured jumper with a shirt underneath and blue trousers.

Tommy said: "There are around 130 people out searching for my dad. Everybody knew him and my mum.

"It would be a great thing if he could see it. It would reinforce the fact he was so well-liked and respected.

"I wish he knew that. Where is he? Dad, just come back."