Jairam Chadha today raised a glass to celebrate his 100th birthday and revealed the secret of his long life - a daily tipple of Irn-Bru.

He began his birthday celebrations as he does every other day - with morning prayers and a slug of Scotland's other national drink.

Alongside the cards from family and friends was a congratulatory telegram from the Queen.

And tonight the former Glasgow shop owner will enjoy a huge party organised by the Hindu community in Cardonald.

Lord Provost Liz Cameron will join family, friends and well-wishers from all over the world to toast his good health.

He said: "I believe I am the first person in my family to reach 100.

"I have always lived a simple life. My father told me not to smoke or eat too much. I don't drink alcohol, but I enjoy a glass of Irn-Bru.

"I believe you should treat your elders like your mother and father, someone the same age as your brother, and a younger person as your children."

Daughter, Kailash Malhorta, 56, said: "He loves Irn-Bru. His mind is very alert. He still reads every newspaper there is."

Mr Chadha was born in Lyalpur in Punjab, Pakistan, and spent 26 years in Kenya working in the shipping industry before emigrating to Scotland in 1965.

He opened a shop in Chancellor Street, Partick, raising five sons and three daughters and worked there until he retired in 1976.

His wife Pushpavati died when she was 63.

Their daughter Birj Ghandi was awarded an MBE for community work, the first Indian to receive the honour.

He still goes to one of Glasgow's two Indian day care centres three times a week and loves playing the board game Frustration.