You get 60 days exemption when you enter Thailand with a UK passport. For whatever reason, if you are referred to the Thai embassy in London, you cannot go to the Embassy physically. Everything is done on line now. You register and apply on the Thai Embassy website.
Go to any of the Super Rich branches either at the airport or other branches. You will get a better rate for £50 notes. I never had a problem. In addition, carrying small notes take up too much space when travelling. Most banks in the UK now dispense £50's from cash machines.
I have been living in Thailand for nearly 10 years now and reading all these posts got me more than confused!! Every post is telling something different!
thank you. I have been looking for that too and couldn't find anywhere, Google doesn't help either other than couple of companies in Bangkok. I don't know why people get so worked up about it!