Glasgow-born singer-songwriter Jim Diamond  famed for hits such as I Should Have Known Better and I Won't Let You Down has died aged 64.

His passing came less than a fortnight after he announced his mother Sarah had died.

His family said they were "deeply shocked by his sudden death" and later in a message to fans invited people to "put on your favourite song today and have a think about him".

He first entered the UK singles charts in 1982 as lead singer with his band PhD with the song I Won't Let You Down which got to number three in the charts.

He went on to get international acclaim with the chart-topping Should Have Known Better and Hi-Ho Silver, the theme tune for ITV series Boon.

He passed away at his home in London.

On September 28, he announced on Facebook that he had lost his mother Sarah.

He said: "Sad to say I lost my mum Sarah last week people say they have the best mum in the world,I did.If you look up tonight and see a couple dancing on a cloud to the sound of the Count Basie big band that's my mum and dad.As always peace to you all Jx."

Glasgow Times:

A family spokesman added: "He was a devoted family man who loved his wife Chrissy and his children Sarah and Lawrence, and the music that he continued to make.

"He dedicated a lot of time over recent years to the Cash for Kids charity appeal in Scotland with his friend Sir Tom Hunter and was still active and well respected on the music scene.

"He'll be much missed by all who knew him and everyone who loved his music and his unique voice and style."

Glasgow Times:

Fans registered their tributes on his Facebook page.

Mhairi Fulton who had Jim Diamond sing at her wedding said: "Words can't describe how devastated I am to hear such terrible news! You were A true diamond!

"I loved you from minute I met you! Our family was blessed to have you in our lives and Scott and I were truly privileged to having you sing at our wedding. I will miss you dearly!"

He was known for his involvement in high profile charity singles.

He sang on cover of You'll Never Walk Alone with The Crowd to raise money for the Bradford City stadium fire in 1985.

And his vocals can be heard on a version of Let It Be as part of Ferry Aid, alongside artists such as Paul McCartney and Kate Bush.

Born in Glasgow’s East End, Jim, heavily influenced by the voices of Ray Charles and Otis Redding, he joined his first band at the age of 14.

Moving to London, he formed the band Bandit and went on to sign to Clive Davis’ Arista Records which  brought his voice to the attention of the Godfather of British Blues, Alexis Korner, who invited him to work with him on his Just Easy album.

He later moved to Los Angeles, USA, and joined guitarist Earl Slick and drummer Carmine Appice to form Slick Diamond.

It was in the 80s that he emerged into the public imagination. 

Returning to the UK, he formed PhD with keyboardist Tony Hymas and drummer Simon Phillips, both of the Jeff Beck Band. Their album PhD enjoyed worldwide commercial and critical success, with the single I Won't Let You Down becoming a multi-million seller. It went on to become the 23rd best-selling single of 1982 in the UK.

The band stayed together less than two years. 

Jim returned to working solo and came back with another worldwide number one, the ballad I Should Have known Better, which got him a nomination for the Ivor Novello Best Single Award.

He then wrote and performed the theme tune to Central TV  series Boon. Hi Ho Silver went to number five in the UK charts. This run of mid 80s success ended with the departure of his record company boss, Derek Green. 

Jim continued recording, and by 1993 he had released Jim Diamond the album. Now out of print, it went straight into the UK Top 20 album chart on release, peaking at Number 16. 

His final album City of Souls aimed to raise money for Scots businessman and philanthropist Sir Tom Hunter’s children’s charity Cash For Kids.

 The album of soul covers featured among others Wet Wet Wet drummer Tommy Cunningham and Greg Kane of Hue & Cry.

One of his last public appearances was on September 23, when he joined a star-studded line-up in London to raise funds for a new Prince and Princess of Wales hospice in Glasgow.