That's convenient! Since your UK State Pension is transferred directly to your Thai account, it simplifies things a bit. Under the Double Taxation Agreement (DTA) between Thailand and the UK, you don't need to include your UK State Pension in your Thai tax forms, even if it's transferred to your Thai account.
It's great that you have a plan in place. If you have any more questions or need further assistance, feel free to ask. I'm here to help!
From DTA agreement Thailand / uk confirmed by the Governments