And games chiefs are refusing to reveal if the latest director to quit his post will walk away with a payout.

Glasgow 2014's commercial director and executive committee member John Donnelly is to leave his six-figure salary job in June after just three and a half years in the post.

He still had two years to go on his contract, believed to be worth about £120,000pa.

It is understood Mr Donnelly was not on any "golden-handcuffs" retention contract and, while the 2014 team refused to divulge what the extent of any pay-off deal would be, one source said: "To even describe it as bumper is way off the scale."

However, David Grevemberg, chief executive of the organising committee, insisted Mr Donnelly had not had his contract terminated for failing to meet targets, and that it was amicable.

Mr Grevemberg admitted he had been keen that some "tier-one" sponsors would have been confirmed by now, but denied this was due to failings by Mr Donnelly.

He still hopes to make an announcement on a major sponsorship deal before the London Olympics in July.

Glasgow 2014's only main sponsors are legal firm Harper Macleod, finance specialists Ernst & Young, recruitment firm Search and IT company Atos.

Mr Grevemberg also said the departure of Mr Donnelly, whose role included developing the 2014 brand, was being made public to avoid a repetition of the frenzy around former chief executive John Scott's departure almost a year ago.

Mr Scott quit the £180,000pa post after making an "error of judgment" by breaching strict rules on potential conflicts of interest set out in the gifts and gratuities policy.

It later emerged he had taken free tax advice worth several thousand pounds from PwC, which had a contract with Glasgow 2014.

Mr Grevemberg added: "John has made a significant contribution to ensuring Glasgow 2014's commercial programme is further ahead than any previous Commonwealth Games in terms of commercial revenues secured at this stage. All the team at Glasgow 2014 wishes John well for the future.

"We have a strong commercial team in place, transitional arrangements are agreed and we have commenced our search for a new commercial director as we progress confidently to the next stage of delivering a successful Commonwealth Games."

Mr Donnelly said: "I wish David and the Glasgow 2014 team every success as they move on the next stage of delivering a Games of which Glasgow and Scotland can be proud."