Following the news that 89% of testers in O2's phone payment Oyster trial wanted to use the system full time, it's been revealed that our cross-channel cousins are having a go at something similar.

SNCF, a French train company, is trialling USB "tickets" that use RFID technology - apparently already in use on the network in France.

The USB side of things means users can plug the flash drive into their computers and load money onto the ticket to make future train ticket purchases by RFID.

With advanced security features for obvious reasons, the tickets will have 4GB of internal memory, but measure just 34 x 67 x 8mm, making them possibly even easier to lose than a paper version.