Thanks, Amy - so there is no problem with me visiting Thailand for a 3rd time in the year on my regular passport? I'm not very savvy with these things. :-)
.... perhaps more worrying guys - my next question because I thought I saw a comment yesterday but can't locate it now: Is there a rule about how many times you can visit for such events in a year? I visited BKK in April for two weeks and then for 7 days in June. This series of events I'm intending to visit are in Late October and into November for another 2 weeks. Is it allowed or is there a way around it if not?