Lord Falconer has said David Cameron has made a "huge difference" to the Hillsborough families' pursuit of justice.
"It is the failure of all previous governments that went before until the current Prime Minister responded so well in relation to the report that has made the difference," he said.
"So now you have a Government, led by a Prime Minister, saying, 'This is a huge injustice, let's sort it out' - and that makes a real difference."
Lord Falconer added that the Government's follow-up to that support is "absolutely critical".
The Attorney General will apply to the High Court to open fresh inquests into the deaths of those killed in the Hillsborough tragedy.
Hillsborough families appear set to receive long-awaited good news today as the Attorney General delivers a statement on future inquests.