Sabrina Guinness, to James Guinness and his wife Pauline, née Mander.
She runs the charity Youth Cable Television in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

, is an heiress

Beneficiary

A beneficiary in the broadest sense is a natural person or other legal entity who receives money or other benefits from a benefactor. For example: The beneficiary of a life insurance policy, is the person who receives the payment of the amount of insurance after the death of the insured...

 in the Guinness family

Guinness family

The Guinness family is an extensive aristocratic Irish Protestant family noted for their accomplishments in brewing, banking, politics and religious ministry...

, and is famous for her contacts in the media

Mass media

Mass media refers collectively to all media technologies which are intended to reach a large audience via mass communication. Broadcast media transmit their information electronically and comprise of television, film and radio, movies, CDs, DVDs and some other gadgets like cameras or video consoles...

 world. In 1979 she dated Prince Charles

Charles, Prince of Wales

Prince Charles, Prince of Wales is the heir apparent and eldest son of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. Since 1958 his major title has been His Royal Highness The Prince of Wales. In Scotland he is additionally known as The Duke of Rothesay...

 before his courtship with Lady Diana Spencer

Diana, Princess of Wales

Diana, Princess of Wales was the first wife of Charles, Prince of Wales, whom she married on 29 July 1981, and an international charity and fundraising figure, as well as a preeminent celebrity of the late 20th century...

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Youth Cable Television was set up in 1995 with the help of Greg Dyke

Greg Dyke

Gregory "Greg" Dyke is a British media executive, journalist and broadcaster. Since the 1960s, Dyke has a long career in the UK in print and then broadcast journalism. He is credited with introducing 'tabloid' television to British broadcasting, and reviving the ratings of TV-am...

. Formerly she worked as PA

Personal assistant

A personal assistant or personal aide is someone who assists in daily business or personal tasks. It is common in design to have a PDA, or personal design assistant....

 for David Stirling

David Stirling

Colonel Sir Archibald David Stirling, DSO, DFC, OBE was a Scottish laird, mountaineer, World War II British Army officer, and the founder of the Special Air Service.-Life before the war:...

, the founder of the SAS

Special Air Service

Special Air Service or SAS is a corps of the British Army constituted on 31 May 1950. They are part of the United Kingdom Special Forces and have served as a model for the special forces of many other countries all over the world...

.

Her twin sister Miranda is married to Keith Payne, the designer of rock concert special effects.