Morrison and Catchpole met when her then-partner was lodging with Morrison’s mum.
He wooed her with Stevie Wonder songs and later said about their relationship: “We had a connection straight away, but I had to wait two years to find out if what I thought I felt was real.”
Morrison won the Brit Award for best male solo artist in 2007, while Catchpole ran the Cotswold Sandwich Box in Whitminster, Gloucestershire.
The eaterie was shut on Saturday afternoon and a local told The Sun: “The whole village is in complete shock. Gill was a lovely woman and they were a beautiful family.”
Morrison previously spoke of his heartache after his dad, Paul, brother Alexis (43), and nephew Callum (21) died within three years of each other.
And in 2019 he revealed his album You’re Stronger Than You Know was inspired by Catchpole after their daughter Ada was born 13 weeks premature.
He said: “The album title is for Gill as she’s been through so much as a woman and a mum knowing we could lose the baby at any point.”