The fact that a conviction was in the public domain does not mean that a spent conviction is no longer private.
'Spent convictions in the law of privacy
It is now clear that, for the purposes of the tort of misuse of private information, spent convictions are private information within the meaning of article 8 of the Convention. Although criminal convictions occur in open court and may be reported on contemporaneously, as Lord Hope explained in R (L) v Commissioner of Police for the Metropolis [2009] UKSC 3 at [27]:
“as [the conviction] recedes into the past, it becomes a part of the person’s private life.”
The Strasbourg Court endorsed this position in MM v United Kingdom [2012] ECHR 1906 [188]. In the subsequent case of Re (T) v Chief Constable of Greater Manchester Police [2015] AC 49 the Supreme Court accepted that the point at which this occurs will
“usually be the point at which it becomes spent under the 1974 Act” [18].
In other words, the 1974 Act functions to “generate” a reasonable expectation of privacy into information relating to convictions which was not previously private.
The starting point is therefore that someone who published a spent conviction could not defeat a privacy claim by arguing that a claimant had no reasonable expectation of privacy because s/he was convicted in open court.
Publishers may seek to rely on information about the offence and conviction having been reported contemporaneously; reports may remain available online long after a conviction is spent for the purposes of the 1974 Act. However, such arguments run up against the Supreme Court’s reasoning on the 1974 Act operating to make spent convictions private. Additionally, as the Supreme Court reaffirmed in PJS v NGN [2016] UKSC 26, the fact that information is in the public domain will not, of itself, defeat a privacy claim. Where the further publication of the information will give rise to (further) intrusion into the claimant’s privacy then this further publication may be unlawful. The publication of information concerning a spent conviction may well give rise to further intrusion into private life.'