That is indeed an interesting story! It was a concert at the
Grosvenor House Hotel in London, UK on
November 29, 1992 for the occation of the
annual Water Rats Ball. It was a black-tie charity event,
in honour of veteran Brit guitarist Bert Weedon, featured George Harrison alongside an all-star line-up including Brian May, Joe Brown, Bruce Welch, The Bachelors and Lonnie Donegan.
The "
Grand Order of Water Rats" originated in 1889 and is
a semi-secret charity organisation populated by entertainers. They use their celebrity to raise money for a variety of good causes and go about it with some "quirky" methods and rituals.
By the way, it was George Harrison's last ever UK show! (GAD already mentioned it)
There is no video of the concert (remember: "
semi-secret") but if you want to know more about the Grand Order of Water Rats watch this interesting video:
Regarding the original picture what you cannot see there he was sitting on a Marshall amp:
Anything else I can help you with?
nthego:
Ralf