How long does it take to get a DTV visa through the Thai Embassy in London, and is rejection common?

Multiple users reported varying processing times for the DTV visa application through the Thai embassy in London, with responses ranging from 4 days to 2 weeks, often contingent on the provision of additional documentation. Some faced requests for extra documents, which could cause slight delays. Rejection appears to happen, as evidenced by one user's mention of having two applications cancelled, though most shared positive outcomes.