There is growing support for a Public Inquiry into the Welsh Government's decision to reject the Circuit of Wales scheme in Ebbw Vale.
Two days after the Leader of the Welsh Conservatives, Andrew RT Davies, called for an inquiry, those calls have now been backed by Plaid's economy Spokesman.
Mr Davies, who led the way in these calls on Tuesday, said the debacle had been a "Welsh Labour car crash of epic proportions".
He said a public inquiry was necessary to uncover the circumstances behind the Welsh Government's apparently overnight decision to drop the scheme.
He said: "The Circuit of Wales has been a Welsh Labour car crash of epic proportions.
"After so many years of uncertainty and false hope, it's clear that Welsh Government have plenty of questions to answer.
"I'm glad that Adam Price has now joined me in calling for a Public Inquiry into the way the Welsh Government has handled this project.
"Whilst I have had longstanding concerns that the Heads of the Valleys Development Company may not be right vehicle for this project, it is hugely disappointing to see it crumbling away in such dramatic and overnight fashion."
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