Mr Burnham, who was heckled at the recent memorial service at Anfield, was instrumental behind Westminster’s promise to disclose the secret documents.

That message was echoed by the now departed Home Secretary Ms Smith, but, with both politicians in new jobs, Hillsborough families are anxious the determination to find answers for the 96 still remains.

Liverpool fan and march organiser Barry Thompson, originally from Bootle, said: “The people in these jobs will have different aims and goals.

“Alan Johnson is the new Home Secretary and we want these promises to be honoured. We have football fans from Northampton to Newcastle joining our numbers on June 20. It is about time somebody put their hand up and took responsibility for what happened on April 15, 1989.”

So far, South Yorkshire police and the other emergency services have agreed to release their files, but no firm timetable for their disclosure has been agreed.

The police force has revealed it has more than 300 boxes to sift through.

Organisers have met with Metropolitan police to agree the route and crowd management because the capital is expected to be busy that weekend with a separate rally taking place to protest against the crisis in Sri Lanka.

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