Liberal Democrat AM Eluned Parrott has written to the Auditor General asking him to investigate Rhodri Morgan's claim that the Welsh Government spent £10m developing Cardiff Bay roads on the understanding that BBC Wales would move its headquarters there.
"If what Rhodri Morgan says is true, then the Welsh Labour Government has spent £10 million on the basis of a verbal agreement that was not even adhered to" she said.
“I believe the Auditor General needs to be looking at this case as a matter of urgency which is why I have written to him today."
"The Welsh Labour Government needs to explain step by step how the decision to spend this large amount of money was taken."
First Minister Carwyn Jones told his monthly press conference today that the Welsh Government would have preferred BBC Wales to choose Cardiff Bay as the location for its new HQ.
He was responding to claims made by his predecessor Rhodri Morgan in an article for Wales Online.
The former First Minister claimed a verbal agreement had been made with the project director of the BBC's Roath Lock drama village that the corporation was considering two sites - one at Roath Lock, and one on Penarth Road.
Mr Morgan said the "broad understanding" prompted the Welsh Government to authorise spending £10m on a new road to 'open up' access to the Roath Basin.
The BBC said the claims were wrong.
"There was no agreement, as far as I understand it" said Mr Jones.
"Although we welcome the investment being made by BBC Wales, I think it's fair to say our preference would have been the Bay".
Welsh Conservative leader Andrew RT Davies has been giving further details of his call for the BBC to be made answerable to the Assembly. He denies the move is about trying to take political control of broadcasting but says its decisions should be scrutinised here in Wales.
Welsh Conservative leader Andrew RT Davies will call later for the BBC to be made answerable to the Assembly. He's writing to the BBC and the UK Government saying that the broadcaster's decisions in Wales should be audited and scrutinised by politicians here.
He says the change should take place as part of the BBC's Charter renewal and be in place from 2017.In a speech to the Institute for Welsh Governance in Aberystwyth, Mr Davies is expected to say