[citation needed] For his 21st birthday, he threw a "lavish" party at Luggala, the Gothic Browne family seat in the Wicklow Mountains, where "two private jets flew the 200 or so guests to Ireland, including John Paul Getty, Mick Jagger, Brian Jones [and] Jones' then-girlfriend Anita Pallenberg.

On 17 December 1966, Browne was driving with his girlfriend, model Suki Potier, in his Lotus Elan through South Kensington at high speed (some reports suggesting in excess of 106 mph/170 km/h).

His grave is one of three situated on the shore of Lough Tay, next to an ornamental building known as the Temple; the two other people buried there are his unnamed baby brother, who was born and died in December 1943, and his half-sister.

[1] The death of Browne inspired some of the lyrics of the song "A Day in the Life" by the Beatles, which was released on their 1967 album Sgt.

In a 1980 interview with Playboy magazine, John Lennon said, "I was reading the paper one day [...] the Guinness heir who killed himself in a car.

It was this news which inspired him to write the following lines: He blew his mind out in a car He didn't notice that the lights had changed A crowd of people stood and stared They'd seen his face before Nobody was really sure If he was from the House of Lords