Professional gambler Findlay will no longer have horses with Paul Nicholls, the trainer of 2008 Cheltenham Gold Cup hero Denman.
This stems from Findlay being banned for six months after being found guilty by the British Horseracing Authority of laying one of his own horses, the Nicholls-trained Gullible Gordon, on two separate occasions in contravention of the rules of racing.
Findlay’s appeal against the punishment will be heard in London on July 14.
“Harry and I have agreed to split up, mainly to do with the situation with the BHA,” said Barber.
“I’ve said I think he has been harshly treated, but at the same time he feels very hurt by it.”
Denman will be owned solely by Barber, Nicholls’ landlord and principal patron.
Big Fella Thanks, another high-profile horse co-owned by the pair, will run in the colours of Findlay’s mother, Maggie.
Fourth in this year’s John Smith’s Grand National, Big Fella Thanks will move to Ferdy Murphy’s stables in North Yorkshire.