Labour peer LordMorris, honorary president of the Haemophilia Society, asked how many people may have been affected and what services had been offered to patients.
The crossbench peer's calls were backed by Labour's LordMorris of Aberavon who argued that the present position was "untenable" and "not in the interest of justice".
Their intervention was welcomed by the Labour peer LordMorris of Manchester - the parliamentary adviser to the Royal British Legion and a long-time campaigner on behalf of the Gulf veterans.