Plaque: World's first cash machine - 2010
Erection date: 12/8/2010
Barclays Bank, Enfield Town branch, the world's first cash machine was installed here on 27 June, 1967.
Barclays Bank PLC - lives made much easier
Plaque unveiled by Jayne Buckland, Mayor of Enfield.
Site: World's first cash machine (2 memorials)
EN2, The Town, 20, Barclays Bank
Londonist have a post on this with some photos of the momentous event.