The managers of the Olympic Stadium have been told to make the details of their rental deal with West Ham public.

The iconic venue is currently being adapted for football but the costs have rocketed to £272million so far, with the Hammers only contributing £15million under the original deal.

But the mayor of London Boris Johnson has refused to reveal the amount the club will pay in rent during its 99-year lease, citing "commercial confidentiality".

Leyton Orient’s former chairman Barry Hearn has been calling for ‘financial transparency’.

Football supporters submitted a Freedom of Information request to obtain the tenancy agreement amid claims the London Legacy Development Corporation (LLDC) would subsidise the rent.

Now, an Information Commissioner has said LLDC, which denied the claims, must now comply with the FOI request, it has been reported.

LLDC had refused to reveal its rent on grounds of commercial sensitivity, but this was rejected by the commissioner on September 3 who said it was not proved there would be a detrimental effect to revealing the information.

The decision comes ahead of West Ham moving into the stadium for the start of the 2016-2017 football season.

There are concerns that if only a small rent is paid they may have a competitive advantage over other teams.

The stadium was built using tax payers' money and is currently in public ownership.

LLDC manages the stadium and is believed to be considering whether to appeal against the independent commissioner's decision.

The Olympic Stadium deal allows West Ham to host all of their home matches at the stadium.