What is the process and requirements for obtaining a DTV visa from the UK?

I will share my DTV experience. Applied in UK so London dealt with everything. Applied on a Wednesday, got a reply the next day requesting more information, i.e., proof of freelance status, proof of savings, and a professional portfolio. In my original application I thought I had shown my freelance status, but they wanted a filed tax return or a letter from my accountant - so I sent a copy of my tax return downloaded from HMRC, my savings had been shown being in 3 different accounts, so I transferred the money into 1 account that day and sent a statement, and as an online tutor, I didn't have a professional portfolio, so I put one together and hoped it would pass. Two days later DTV issued. Thank you very much to the Thai Government, as this 5 year visa is a dream come true.