In ,
Ian Tindale typed:

*and that's another thing - why was I penalised £3 just to carry
around this useless card for a while?


I have always presumed that the £3 deposit is charged to cover the potential
cost of somebody making a multi-zone journey when there isn't enough credit
left on the card. An Oyster with a travelcard can just block use until a
'pre-pay journey in excess of credit' has been undertaken, whereas a PrePay
only card-holder could just throw the card away and buy another if it were
not for the deposit which has been paid.


Bob