Kenworthy, whose four-year contract expires in February 2017, began banally enough, observing that the past year had seen “the best times and the worst times in anti-doping”.

He added: “Finding the odd flawed athlete is the norm but finding that whole systems are corrupt and that governance of sport is woefully inadequate and also possibly corrupt threatens the wholesome face of all sport.

“[UKAD] is at the forefront of protecting clean sport.

“Since its inception in 2009 all its efforts have been directed at weeding out the cheats, whether they be athletes or support staff and ensuring that they receive their just desserts.

“To read the findings of the World Anti-Doping Agency (WADA) Independent Commission makes one wonder whether the effort has been worthwhile.

“The foundations of trust that guide anti-doping organisations have been seriously undermined.

“Clean athletes must rightly question whether any competition is, or has been, fair.”

If nothing else, these comments - from an individual not known for outspokenness during his tenure at the helm of British anti-doping efforts - highlight the demoralising effect of the WADA Commission, which published allegations of state-sponsored doping in Russian athletics.

They come just ahead of the expected publication tomorrow of another keenly-anticipated report into allegations of state-sponsored doping at Sochi 2014.

This is already provoking tension among sports administrators amid calls for a blanket ban on Russian athletes competing at Rio 2016.

UKAD has come under fire itself recently, being strongly criticised in an independent report this month for its failure to alert the General Medical Council (GMC) about allegations that a Harley Street doctor had helped sportspeople take performance enhancing drugs.

In his report, Kenworthy notes that chief executive Nicole Sapstead has “successfully endured a baptism of fire” with the support of “a very capable team of directors that was reduced in size to allow smarter working and to reduce overheads”.

UKAD’s latest annual report, covering the 12 months to March 31, also reveals that it is in dispute with Government over occupancy costs at its Fleetbank House base.

The report states: “Following the transfer of Fleetbank House from the Office of Fair Trading to the Department for Business Innovation and Skills (BIS), a disagreement has arisen concerning the level of occupancy costs.

“The agent acting for BIS sought £302,000 ($398,000/€361,000) for the year ended 31 March 2015 against the £221,000 ($291,000/€264,000) which was considered due and recognised in the Statement of Comprehensive Net Expenditure.

“A similar difference will have arisen for the year ended 31 March 2016 but no request was made by the agent acting for BIS.

“UKAD is seeking to resolve this matter and depending on the outcome of the dispute, some or all of this approximatley £160,000 ($211,000/€191,000) may become payable.”

The report confirms - as revealed exclusively by insidethegames in March - that UKAD has been “advised that financing will be reduced in 2016/17”.

insidethegames reported that the cut was coming because “from 2016-2017, the government will no longer pay [UKAD] additional grant-in-aid to cover the UK’s contribution to the World Anti-Doping Agency (WADA)”.

In 2015-16, this contribution was £490,000 ($646,000/$485,000).