Thai dancers at Wat Buddhapadipa พุทธปทีป temple, Wimbledon, London, 18/06/06.
This festival was a simultaneous celebration of HRH King Bhumipol's 60th year on the Thai throne, and the 40th year since Wat Budapadipa was founded.
Apparently this dance is called "The Dance of the Nine Gems" (RABAM NOPARAT ระบำนพรัตน์ or RAM NOPARAT in Thai).
[Thanks to Rachana909 for the Thai name of the dance].
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Video Copyright (c) Blutey.