McCartney rented the flat from Starr in 1965, and asked Sommerville to install recording equipment (including two Revox reel-to-reel tape machines); planning to use it as a demo studio, and for recordings of spoken-word albums.
When Lennon started a relationship with Ono in 1968, his wife and son moved into the flat on 21 June 1968, living there for three months, before returning to Kenwood, as Lennon and Ono preferred to live at Montagu Square, rather than in isolated Weybridge.