How much money is required in the bank to apply for a Thai business visa from the UK?

To apply for a Thai business visa from the UK, you need to show evidence of adequate finances, which includes having at least 20,000 Baht per person or 40,000 Baht per family. It's important to note that a letter of invitation is also required, and owning a company in Thailand does not automatically grant you a visa or work permit. There has been some confusion about the differences between a business visa and a work permit, which are distinct processes.