I have been online (not just in recent weeks, for repeatedly over the last 18 months) to try to add a different i.e. non-Tesco current account as my "linked account", for the payment of interest from my Savings Account, and also to where the capital will be paid when I close my (fixed term) Savings Account, but it does not permit this; the only account is the one that was linked when the Savings Account was opened, which is to be automatically closed.
I have kept the Current Account open, and funded, so that it is not closed, and is not inactive (I use it for all my purchases at Tesco, on Tesco.com, and with a few other retailers) but if it is closed, what then? I know banks can still pay money to customers who have closed accounts (usually by means of a cheque to the last known home address) but surely, in the case of customers with another account which will remain open, Tesco should keep the linked account open until the maturity of the Savings Account, as it the means by which the latter is administered and funds paid out.
I have other accounts with other banks, but do not wish to provide these details to Tesco; so far as Tesco Bank know, I only have their accounts. Even the source of the savings (funds) is an account, and indeed a bank, which no longer exists, so the money, if paid out there, would take a long time to get to me (I am not even sure who has financial responsibility for that bank, post-collapse).