RFU Chairman Bill Beaumont has reiterated the Union's desire to find a solution to the current European rugby crisis.
Following the IRB's earlier statement on Wednesday that they would not back any European competition that did not have the full backing of all participating Unions, Beaumont stated the RFU were still looking for a resolution.
The Premiership clubs' stance is currently to break away from the ERC to form a new competition, with the four Welsh regions - Blues, Dragons, Ospreys and Scarlets - electing to join.
The remaining five Unions in the Six Nations have all committed to playing in whatever ERC tournament is formed next season.
The RFU continues to urgently work with all parties, with the clear aim of ensuring that a competitive European tournament continues beyond this season, to grow the game both domestically and across Europe.
"The RFU has been consistent in its view that our primary focus should be to maintain a genuinely pan European tournament so rugby can continue to thrive," said Beaumont.
"For this to be achieved, all parties need to work collaboratively, so that everyone benefits, not least the players and supporters, who have done so much to make European rugby so memorable.
"Rest assured I am working closely with RFU CEO Ian Ritchie, and other stakeholders, to find a solution.
"I welcome the support of the IRB in helping to ensure that this happens and of course as a member Union abide by and support the IRB Regulations."