SECRET documents implicating a former Tory prime minister, spooks and senior cops in colluding to secure convictions against the Shrewsbury Pickets were sensationally revealed in Parliament yesterday.

The government has cited national security concerns as the reason it cannot release classified documents that could help overturn convictions against 24 builders, including jailed pair Ricky Tomlinson and Des Warren.

But shadow home secretary Andy Burnham blew the case wide open by exposing previously unseen documents in a parliamentary debate on the historic injustice.