I thought Aga Khan didn't run horses in UK?

never been the case.

No big racing fan here but wasn't there a drug problem with one his horses which he disputed and as a result refused to allow them to race in UK any more?

Involved camphor if I remember.

Brought his own commentator with him?!

he thot it was eezy money, but the plucky brits sent him back home

.
http://www.independent.co.uk/sport/racing-aga-khan-ends-fouryear-boycott-1389790.html

filly in oaks banned for substance (snow???) in late 80s...

or maybe he's pissed off that the Empire recognized his chancer of an ancestor as a direct descendant of the Big Man through Hassan i Sabbah which allowed millions in tribute/tithes to be collected from superstitious sect followers, which was in turn spunked off on yachts and horses...

ta pump