You can start your journey anywhere. Used a SE The Key Travelcard at Victoria Underground on first tap with no issues. All cards work the same way.
Thanks, I've found out you can start from anywhere - useful as depending on where I'm going I sometimes start at Heathrow T4.
I know I can start wherever I want but the fact is Tap2Go has registered an incomplete journey despite the same ITSO card having a pre bought ticket loaded onto it on the same day. Surely the software should recognise the pre-loaded ticket and disregard the Tap2Go element ?
This is happening to me too. On two occasions now I've pre loaded an Ashford to London 1-6 travelcard and been incorrectly charged £1.45
The first time I complained I was told by SWR customer relations that "If you have Tap2Go set up on your Smartcard, we recommend not adding further tickets to the card, as its set up to process any taps under the Tap2Go scheme. You would have been able to amend this tap on your account after you received the email stating you had a charge, this would have been stated in the email. You then have until the following Tuesday to makes this change."
Which is pretty much wrong on all counts, as the SWR website (
https://www.southwesternrailway.com/train-tickets/tap2go) says "Train tickets and season tickets can also be stored on your smartcard with Tap2Go.." and there was no option in the email or my website account to amend the charge. I tapped in and out on entry and exit for all journeys on both occasions.
I've just ordered another smartcard without adding tap2go to avoid dealing with SWR's inability to get anything right.