I’m a British passport holder. I applied for a single entry tourist visa at thaievisa.go.th in early October. Having done this in 2022 I expected it to take a matter of days. I submitted the last of the requested documents towards the end of Oct but still today my application was pending in the system. All research suggested waiting for 30 days before getting worried, but I emailed visa.lon@mfa.go.th this morning and got the visa approved this afternoon.

Just wanted to share the benefit of emailing the embassy should you have any concerns.