What are the requirements and experiences for applying for a DTV at the Thai embassy in London?

I will need to apply for a DTV from the UK embassy.

What are peoples experiences of applications through there?

Having looked through a lot of posts etc, I am still confused by what is actually required by the London embassy as requirements seem to differ greatly between locations.

I have been told that London only requires the bank balance on the month of the application, not 3 months, that they do not check previous earnings ( I do have them ) and other diffferences in some requirements.

I would be applying as a freelancer with a portfolio of apps and my marketing business.

Could people who have actually applied through the London embassy please confirm what the emabasy actually requested so I can be fully prepared.

There is so much conflicting information out there that I need a better perspective from people that have actually done it.

Thanks