MPs have launched a further inquiry into the £4bn restoration of the Palace of Westminster.
The public accounts committee will oversee the probe but did not reveal any detail as to what evidence would be discussed.
It is also unclear when the inquiry’s findings will be revealed.
One MP speaking during a debate on the restoration proposals last week said there was no doubt that engineers, architects and consultants would need to readdress the costs of the project – which she said would be different from those submitted last year.
It has been five months since the joint committee appointed in July 2015 to oversee the restoration project issued recommendations for a full decant of the Palace of Westminster.
The recommendation came off the back of a report issued by a consortium including consultants Deloitte Real Estate, Aecom and Hok.
Scenarios outlined for carrying out the works ranged in cost up to £7bn.
According to an industry source, firms that had submitted bids for the programme, project and cost management services contract were expecting to hear back by the end of July last year as to whether they had scooped the deal.
However, the source said there had been a “lack of communication” regarding the progress in the procurement process.
A spokesman for the Restoration and Renewal programme said: “The Joint Select Committee on the Palace of Westminster was appointed by both Houses to consider the independent options appraisal, and its recommendations are still awaiting consideration.
”It spent a year considering the options, subjecting them to rigorous scrutiny and commissioning additional work on options not included in the IOA.
“Its recommendations are due to be considered by members of both Houses in forthcoming debates, due to be scheduled shortly.”