What documents do I need to apply for the DTV visa in Thailand with an employment contract or a business?

Hello, I am interested in applying for the DTV visa through the Thai embassy in London, UK. I have an employment contract for 3 days a week that pays a regular fixed income monthly. I also own a registered Ltd company in the UK, a mobile apps company, which also generates a variable passive income each month.

I would be grateful if anyone could share what documents they had to provide either for a business they own or if they have an employment contract with a UK company, as I suspect each will vary. I am trying to assess whether I should apply using my company (which earns far less and has an inconsistent income each month) or my employment contract, which is fixed and significantly higher. Thank you for your assistance.