We can reveal that ex-Special Branch detective Tony Robinson says he received warnings about repeating facts relating to disgraced Liberal MP Cyril Smith and over his monitoring of other politicians.
Tony, 81, now retired and in poor health, said he was “shocked and surprised” by warnings from his old bosses at Lancashire Police.
He said they told him his knowledge was still protected by the Official Secrets Act (OSA), adding that he should not speak to the media.
Tony, who retired more than 20 years ago, said: “I took this call from a man at my old HQ telling me not to speak about things from years ago.
“I could hardly believe it.
"They have not been in touch for years and then to threaten me or point out that I am still covered by the OSA was ridiculous.