Borlase was born at Dulwich in London and grew up Margate, where her father was a plumber.
[3] After a career break, Borlase returned to art in 1967, creating landscapes of Venice and, later, of Carperby in north Yorkshire where the family had a cottage from 1961.
[3] As well as painting Borlase took up print making after taking a course at Morley College in 1977 and in the 1990s began experimenting with computer graphics and also decorating furniture.
[3] Borlase was a frequent exhibitor at the Royal Academy in London and in group shows.
[3] Borlase's paintings featured in the exhibition The Secret to a Good Life which opened at the Royal Academy in September 2018, some months after she died.