Seems that the Royal Thai Embassy are using the same brush!
FAQ about Thai visa
1. I would like to go to Thailand for vacation for 2 weeks. I hold British passport. Do I need a visa?
Nationals of the United Kingdom and over 40 other countries are eligible to travel to Thailand, for tourism purpose, with the exemption of visa and are permitted to stay in Thailand for a period of not exceeding 30 days. Therefore, you do not need a visa.
However, please make sure that you are in possession of a passport valid for at least 6 months, a round-trip air ticket, and adequate finances equivalent to at least 20,000 Baht (450 pounds) per person or 40,000 Baht (900 pounds) per family. Otherwise, you maybe inconvenienced upon entry into the country.
Furthermore, foreigners who enter Thailand under this Tourist Visa Exemption Scheme may re-enter and stay in Thailand for a cumulative duration of stay of not exceeding 90 days within any 6-month period from the date of first entry.
https://london.thaiembassy.org/en/page/84498-faq?menu=5d6636cd15e39c3bd00072ef