The Oireachtas Committee on the environment is to ask Anglo Irish Bank to appear before it to set out a timetable of how and when it decided to lend money to the Becbay consortium to buy the €411m South Wharf site in Dublin 4.

Becbay is made up of the Dublin Docklands Development Authority (DDDA), Bernard McNamara and Derek Quinlan.

The committee met last Tuesday and decided to summon the bank to a meeting. If Anglo declines, the committee intends to use the fact that the state now owns the bank to demand documents relating to the financing of the site purchase.

Anglo lent €288m for the site but the recourse was limited to €100m plus the value of the site itself.

The Sunday Tribune has obtained three so-called "desk-bound" valuations of the site recently from land experts which valued it at €90m, €120m and €125m respectively.

The DDDA refused to comment on queries from the Sunday Tribune about possible cutbacks in its budget, particularly on the arts, social and cultural side of the authority's work, because it was a matter for the board.

Meanwhile, following queries from the Sunday Tribune, a spokeswoman for the DDDA has confirmed that the authority's code of ethics was changed two years ago.

"In November 2007 the chairperson of the finance committee proposed to the board that what had been three separate committees should be amalgamated into a new committee to be known as the audit, finance and risk committee," she said. "The committee had taken external advice and had proposed terms of reference for the new committee. The board agreed to the amalgamation and, having considered the issue, also agreed that the new terms of reference should be adopted and that the code of conduct for the Dublin Docklands Development Authority should be amended accordingly."