Sir Richard Branson has said he is "heartbroken" over the death of his wife Joan aged 80.

The pair, who married in 1989, had three children and five grandchildren.

In a post on Instagram, the Virgin Group founder said his wife was his "best friend" and "guiding light".

"She was the most wonderful mum and grandmum our kids and grandkids could have ever wished for," the 75-year-old wrote.