STN summer seats
If you sign up on the Easyjet website, they'll send you an email when seats go on sale. It is possible that the email may not go out on the exact day that seats are on sale - but you should receive the email at least within a few days.
Assuming your Electron card is tied to a bank account, the card shouldn't be the reason for needing to know the exact day that tickets go on sale - if you're transferring funds between 2 bank accounts in the UK, it's no longer necessary to wait 3 days for the money to go through - mention ' faster payment service' to your bank and they can do the rest.
If you want your card to be based with a bank, Halifax do an account with Electron which was intended for those who are unemployed and really don't want to go overdrawn accidentally.
Note to mods - I don't work for the Halifax - please feel free to delete the Halifax bit if this is deemed to be an overly commercial plug.