BS”D
When I bought that Caol Ila, it was after a self imposed ban due to a psak from Rav Landa shlita that NO scotch was acceptable. I believe Rav Landa’s office does have a list of approved scotches at this time.
All of the rest of my information is from a renowned kashrus expert, namely Rabbi Don Yoel Levy – OK Labs. He backed up his statements with pictures from the Johnnie Walker Distillery. However, he does not make definitive statements regarding that which he does not certify.
Nevertheless, I do not purchase sherry cask aged scotches for public consumption, and since I do not drink in private that means I don’t purchase such scotches. It is not worth arguing with someone over or having someone suspect me in general. The only way I would consume same is if it was given to me as a gift or served at a reliable friend’s home or kiddush.