Sinn Féin president Gerry Adams met British prime minister Tony Blair in Downing Street yesterday to discuss the implications of the Police Ombudsman's report on collusion between former members of the RUC special branch and the UVF in north Belfast.
Mr Adams told reporters after the meeting it was clear "collusion" and what he called "British state terrorism" was "a very big problem . . . and that there is much more to come out".
His party's delegation raised a number of specific cases with Mr Blair.
Martin McGuinness MP said it was important to explain "the human dimension" of a policy fellow MP Conor Murphy claimed was "widespread across Northern Ireland throughout the Troubles".
Mr McGuinness said there was now an acceptance by the British prime minister that "this is a major problem that will have to be dealt with".
However, Mr Blair's official spokesman said what the prime minister accepted was that any collusion was totally unacceptable and that "if there is any follow-through on the ombudsman's report we will do that".