Last month, Professor John Catford resigned from his pounds 80,000- a-year post as head of the agency after admitting an affair with a colleague during an official trip to Brazil. In the Commons, Professor Catford was accused of fiddling expenses, and MPs sought an inquiry.
Mr Griffiths had earlier written to the Secretary of State for Wales over several matters he said he had been uneasy about, after claiming that an approach to agency executives had fallen on deaf ears. Last week, Mr Griffiths was sacked for 'leaking confidential information'. He denied the allegation.