Ms Catchpole was found in her home in Whitminster, Gloucestershire, on Friday morning. The demise is being treated as non-dubious.
She is the mother of Mr Morrison's two little girls and the two have been a couple since they were youngsters.
"The demise is being treated as non-dubious right now.
The couple were together for something like twenty years, and met after Ms Catchpole moved into Morrison's mom's home as a guest.
Morrison, 39, is most popular for his tunes You Give Me Something and Broken Strings.
"The coroners and lady's closest relative have been educated," a police explanation said. Officials had been called to help a lady matured in her 40s.
He has four top 10 collections, including two number ones. He additionally won the Brit Grant for Best English Male in 2007.
The Warwickshire-conceived artist experienced childhood in Cornwall and busked in the city of Newquay.
The vocalist told The Mail On Sunday in 2015 that he removed time from music in the wake of losing his dad, sibling and nephew inside a three-year duration.