Judy B! I enjoy Sicily as well!
Neither of these are dress up places. I've gone to both wearing my typical travel clothes that I've had on all day.
There is also the very best cake shop between Sicily and Thomas Cubbit called Peggy Porschen cakes. Oh. M. G.
IF you are in the mood for Thai, I had very good food at Rosa's Thai Victoria.
https://rosasthai.com/locations/rosas-thai-restaurant-delivery-takeaway-victoria
This is the most casual of the 3. It was also very busy when I went there. I got there a little after 5, I think, on a rainy afternoon. After I was seated (no reservation) I watched as they turned folks away for the rest of my dinner.