This is a reply to my own email post on 15-10-2024 in case anyone has suffered similar problems.
Having raised a formal complaint to try and resolve undelivered email problem the complaints process worked reasonably well.
Unfortunately, the last successful email I had received was too old for TT to track it in their systems to see what might have occurred.
I subsequently contacted Virgin Money tech team and discovered that to my surprise emails to my TT account from Virgin Money's "savings" sender address had been blacklisted as being spam by the receiving system/me. Told Virgin I was les than impressed given that the reason for undelivered emails was their own system, but they could not identify the specific email that had been marked as spam.
Given the undelivered "savings" emails were specific to my account and not general promotion stuff it is unlikely that I would mark such
emails as spam.
I subsequently checked with Aldermore which had also been having emails returned as undelivered. Turns out that the cause was the same as with Virgin - my recipient TT address was again blackilisted as spam.
I think it very unlikely that I would have identified two different personal email sources as spam but nobody seems able to confirm the actual cause.
So if other TT users are experiencing similar issues I suggest it is worth checking with the sender if their recipient TT address has been blacklisted.
