What is the current status of visa applications at the Thai embassy in London?

Mine was 30 days , from start to getting my visa approved . Additional information was only to show my 1 way flight which i had to book .

Recent reports are about a 1 month processing time for DTV from London. If the flight information you provided was not at least a month away from the end of December, expect them to send you a request for a ticket booked at least 4 weeks from the date they send you the request, along with some additional documents like a statement from you saying you will not leave the UK until the application is processed, along with updated proof of your current location.