Campbell was on holiday with a group of jockey friends when he reportedly died as a result of a swimming accident.
Campbell Gillies celebrates his win -Albert Bartlett Novices' Hurdle Photo taken by Meteorshoweryn (taken from Flickr)
Arguably, Gillies' most memorable ride was on Lucinda Russell's Brindisi Breeze in the Albert Bartlett Novices' Hurdle in March at Cheltenham.
Sadly, the gelding died in May after he collided with a fuel tanker. The horse was Russell's first success at the jumps racing's premier meeting and is still greatly missed by all.
Even at the age of 21 the Scotsman proved to be a top winning jockey. He was to celebrate his 22nd birthday tomorrow (Wednesday) which makes the news even more poignant.
Campbell rode over 50 winners for Russell and this message was put on her website (http://www.lucindarussell.com/):
"He was a much loved, popular and respected member at Arlary House, and it is so hard to lose part of our 'family'. Our hearts go out to his mother Lesley, brother and sister Finlay and Rita.
"We are immensley proud of the achievements of Campbell. It was through his innate ability and talent that he reached great heights as a jockey at such an early age.
"More than that he had a wonderful charm that I believe came across to everyone who met him, and through his media interviews."
My thoughts go out to Campbell's family, friends and work colleagues today. I am only aged 19 and to see such a talented young man who was only two years older than me go too soon is shocking.
Racing will not be the same without Gillies but he will be forever remembered. RIP.