BT Phonecard

​1981-1987
In 1981 BT introduced Phonecards which allowed users to pay for telephone calls at telephone boxes with credit stored on pre-paid cards.

1991-2002=4
Phonecards were withdrawn from sale in 2002 though continued in use until 2004 in non-public situations.

1995-1996
Used during trials for a new version of the Phonecard from 1995 until 1996.