Very convincing scam and had all my details - clearly they had cloned the TSB number as well as my card and needed me to approve transactions- with the line that the money had gone and that I had to approve the transaction in order to get the money back.
Probably to tell you that they have noticed suspicious activity on your debit or credit card and asking you to confirm if you made a list of transactions either on the call or followed up by text messages
This is an automated number from TSB that I was asked to call for an online transaction I didn't make. They asked me security questions to key-in and I was expecting a call back. As this didn't take place all day, I called TSB fraud team only to confirm that this was a genuine process and my card needed to be cancelled and replaced.