First 3 months you can drive on your UK licence. Then you should (but some do not) go to the Transport Office and they will after a few easy tests, issue you a Thai licence. Note that car and bike are separate licences. You can purchase a car or bike. Very simple and painless but first you need to obtain a residency certificate from Immigration. Taking a vehicle out of Thailand can be difficult, especially the insurance aspects.

You probably have a Visa Exempt stamp in your passport rather than a visa on arrival which cannot be extended.

@Darren ******

Provided that you meet the requirements.

Australian passport holders are not eligible for a visa on arrival. You could get a visa exempt stamp in your passport good for 30 days.

I bring 3 months of prescription medications from Australia every time I come to Thailand. I have never been searched or queried.

That is the normal method. If the Thai person enters Thailand using their foreign passport then they are treated as a foreign person and need a visa and are subject to 90 day reports etc.

@Benjamin *****

Thank you. I thought the same but wanted to check.

@Garrett **********

I have never heard of a permanent visa. Can you provide an Immigratrion link explaining it?

What would you like to know?

@Peter ********

Designated hotel.