Rishi Sunak declared Monday a “day of shame for the British state” as he apologised for the failures of successive governments over the infected blood scandal and promised to pay whatever it takes to compensate the victims.

The prime minister issued his apology in a packed House of Commons chamber, hours after Sir Brian Langstaff published his report which accused the British government of covering up the disaster.

Sunak spared no element of the British government in his criticism, which highlighted failures by ministers, civil servants and the NHS. But he was also accused of deepening victims’ pain by not setting up a compensation scheme a year ago when it was first recommended by Langstaff.

He said: “This is a day of shame for the British state. Today’s report shows a decade-long moral failure at the heart of our national life – from the National Health Service to the civil service to ministers in successive governments at every level – that people and institutions in which we place our trust failed in the most harrowing and devastating way.”

Sunak added: “This is an apology from the state – to every single person impacted by this scandal. It did not have to be this way; it should never have been this way. And on behalf of this and every government stretching back to the 1970s, I am truly sorry.”

Ministers will reveal on Tuesday how much they will set aside for compensation payment to victims and their families: 30,000 people were infected and 3,000 died. “Whatever it costs to deliver this scheme, we will pay it,” Sunak promised on Monday.

He was speaking after Langstaff unveiled the findings of his 2,500-page report just across the road in Methodist Central Hall. The report found much of the damage done by the scandal could have been avoided, but that successive governments “did not put patient safety first”.

Sunak’s address to the Commons followed in a line of prime ministerial apologies on behalf of the British state, including those by David Cameron for the Bloody Sunday massacre and the Hillsborough tragedy.

John Glen, the paymaster general, will give full details of the compensation scheme on Tuesday. Sunak is reported to have authorised payments worth around £10bn, which will be funded by extra borrowing and counted as capital spending to avoid breaching the government’s borrowing targets.