But in the first case dealing with the privacy of internet bloggers, the judge ruled that Mr Horton had no “reasonable expectation” to anonymity because “blogging is essentially a public rather than a private activity”.

Coming down in favour of freedom of expression, the judge also said that even if the blogger could have claimed he had a right to anonymity, the judge would have ruled against him on public interest grounds.

The police officer, the judge said, had argued that he should not be exposed because it could put him at risk of disciplinary action for breaching regulations with his disclosures.

But Mr Justice Eady criticised that argument as “unattractive to say the least”.