That was also my first experience, sometime back around 2003!

I remember eating them 30 odd years ago at the MCG.

Found these lovelies today at Makro 

In addition to the elevators: you cannot take the two main elevators to the 22nd floor, Pastell Rooftop Bar. There is no information that you have to switch to the side elevator. 

Great stuff and many thanks for that. My situation would be slightly different as I'm technically self- employed, although in a partnership. So my thinking was maybe a covering letter from myself and then another letter from accountants/solicitors to verify my status. Another option would be retirement visa, however the DTV visa would be more accurate as I'd still be still working whilst in Thailand and then travelling back to the UK roughly every 60 to 90 days for a few weeks before returning to Thailand. I'd probably try and avoid spending the 183 days per year in Thailand that means you need to do a tax return.