I recently got a smartcard from Southwestern, as I often travel from Redbridge station which has no ticket machine but does have a card reader. The leaflet that came with the card says you can buy season tickets, carnets, single and returns for the smartcard. However, so far I've not been able to do this, as booking online with Southwestern there is no option to load tickets to a smartcard, not for singles and returns anyway. I then checked here: https://www.southwesternrailway.com/train-tickets/smart-ticketing, where it doesn't mention singles or returns being available. Can anyone tell me what's going on?