The commitment came after Tessa Munt raised the case in prime minister’s questions, pressing for direct engagement with the families who have campaigned for more than three decades for answers.

The Chinook Justice Campaign said Sir Keir’s response marked the first time in a generation that families have been offered the opportunity to put their case directly to the country’s most senior political leader.

Jenni Balmer-Hornby - whose father died in the crash, said: “We are grateful to Tessa Munt MP for raising the Chinook case so powerfully in Prime Minister’s Question’s today and ensuring the voices of the families were heard directly by the Prime Minister.

“After more than three decades of unanswered questions, the Prime Minister’s agreement to meet is a significant and welcome step. We hope that meeting takes place as quickly as possible, and marks the beginning of a meaningful process to finally deliver truth, transparency and accountability for the families.”

The RAF Chinook HC Mk2 ZD576 crashed on the Mull of Kintyre on 2 June 1994, killing all 29 people on board. For years, the pilots were wrongly blamed for the disaster before being formally cleared in 2011.

Families have continued to campaign for full disclosure of all documents relating to the crash and for a judge-led public inquiry, arguing that key questions about the circumstances of the disaster remain unanswered.

The campaign said it now hopes Sir Keir’s intervention will break the long-standing impasse, and lead to a clear timetable for the release of information and consideration of a full independent inquiry.