Guinness ad from 1994 featuring the song “We have all the time in the world” by Louis Armstrong. The song was not registered in the music rating charts in the UK when first released, only becoming well known 25 years later, as part of a Guinness beer commercial after the band “My Bloody Valentine” chose to cover it for charity.

Guinness is a popular Irish dry stout that originated in the brewery of Arthur Guinness (1725–1803) at St. James’s Gate, Dublin. Guinness is directly descended from the porter style that originated in London in the early 18th century and is one of the most successful beer brands worldwide.

A distinctive feature is the burnt flavour which is derived from the use of roasted unmalted barley (though this is a relatively modern development since it did not become a part of the grist until well into the 20th century). For many years a portion of aged brew was blended with freshly brewed product to give a sharp lactic flavour (which was a characteristic of the original Porter).

Although the palate of Guinness still features a characteristic “tang”, the company has refused to confirm whether this type of blending still occurs. The thick creamy head is the result of the beer being mixed with nitrogen when being poured. It is popular with Irish people both in Ireland and abroad and, in spite of a decline in consumption since 2001, is still the best-selling alcoholic drink in Ireland where Guinness & Co. makes almost €2 billion annually.

The company had its headquarters in London from 1932 onwards. It merged with Grand Metropolitan plc in 1997 and then figured in the development of the multi-national alcohol conglomerate Diageo.

Info gleaned from Wikipedia