Can I apply for a Thailand Special Tourist Visa (STV) from Cambodia or Laos if I am a UK citizen?

Hello.

Does anyone heave any recent experience applying for a STV in a country adjacent to Thailand?

I live and work in Bangkok but would like to quit my job and take a few months as a tourist before making my next step. It seems

that STV makes most sense (?) cos I already have accommodation here and am not sure how long I want to stay....but on the website for Thai Embassy in Phnom Penh the advice seems to be specific to Cambodian nationals (and I am from the UK). I could not find anything on Thai Embassy website for Laos.

1. So if anyone knows if they are issuing STVs from these embassies i would appreciate your input.

1. And if there are any special requirements above and beyond the current Covid related hoops to jump through? For example, did you have to show proof of onward travel?

Thanks.