capital gain loss and high stamp duty refund

Hi, I purchased a flat at £300,000 in 2019 and rented it out. In June 2022, I rented my own house out and moved into the flat. I claimed the flat as my main house. And in December 2022, I purchased a new property and moved in as my main house. The flat has been rented out since then again. Now I sold the flat, and have two questions as followed. 1. Can I apply high stamp duty refund for my new house as I sold the previous main house (the flat) within 3 years? 2. The flat sold price is £280,000 which means I have £20,000 capital loss on it, can I apply capital loss on it as well? Or it has been treated as previous main has and no capital loss could be applied? Thank you.

Name removed admin .

Hi,
1. we do not deal with Stamp duty on this forum and you will need to contact them direct, Stamp Duty Land Tax or contact the SDLT helpline on 0300 200 3510
2. as you claimed this as your main residence, there is no gain/no loss for tax  purposes when the property is sold.
Thank you.