RTÉ has learned that an investigator working with the banking inquiry has made allegations of wrongdoing under whistleblower legislation and that these are being investigated.

The claims have been made to the Acting Clerk of the Dáil and relate to the work of investigators alleging serious irregularities.

The person made the allegations about wrongdoing in connection with the operation of the investigation team on the banking inquiry last April and again last June.

It is understood these allegations relate to alleged preferential treatment which the whistleblower feels was given in the workings of the investigation team to the Central Bank and the Department of Finance.

It is suggested the Central Bank insisted on a whole series of redactions in documents that it supplied.

It is also being suggested that the Central Bank, at a critical point, was allowed a lengthy meeting with the lead investigator.

Fianna Fáil Senator Marc MacSharry, a member of the banking inquiry committee, is calling for an independent inquiry into the allegations.