The Gibraltar-based sportsbook and betting exchange have accused Manchester United of having used them as a stalking horse in attempts to attract other sponsors, despite their £70m offer.
Press reports suggest that Mansion never had a realistic chance of landing the shirt sponsorship deal as Manchester United was reluctant to enter into a high profile deal with a gambling company.
Just four days after withdrawing from negotiations with Mansion, the Red Devils announced a four-year, £56.5m sponsorship deal with the insurance giant AIG.
Announcing the deal, the United Chief Executive David Gill said: “Let\’s be clear. We passed up the opportunity to do the world\’s biggest shirt deal to do the right shirt deal, one that is right for Manchester United and one that underlines our position as the world\’s leading club.”
UPDATE: Mansion has been mentioned in connection with a £10m bid for BetDirect, Sportech\’s sports betting division. At the end of last week, speculation linked BetDirect to online casino and poker operator 32Red and to Gibraltar-based sportsbook Stan James.