Michael Rainey, in whose...

...London men’s boutique shopped the Rolling Stones and others, died at age 76.

From his New York Times obit:

Mr. Rainey was married at the time to Jane Ormsby Gore, an editor at Vogue magazine whose father, David, had been the British ambassador to the United States (and proposed marriage to the widowed Jacqueline Kennedy in 1968 but was rejected, as revealed in a letter discovered last month). Ms. Ormsby Gore knew the Rolling Stones and has been cited as an inspiration for their song “Lady Jane.”

P. S. That's Brian Jones, who died in 1969, playing the Appalachian dulcimer in the foreground of that video.