Mr Collins, 61, made a number of calls over a two year period to his local MP, David Taylor. Sometimes he spoke to Mr Tayor's staff in the North West Leicestershire constituency; sometimes he left recorded messages to which staff and Mr Taylor himself later listened.
Collins was described in court as holding "strong views on immigration and asylum policy". He referred to "Wogs", "Pakis", "Black bastards" and "Niggers" in his calls. Some who received the calls described themselves as shocked, alarmed and depressed by the language.
Under the Communications Act 2003, it is an offence to send over a public electronic communications network a message that is "grossly offensive or of an indecent, obscene or menacing character". The wording can be traced back to legislation passed in 1935 and the charges were brought under an Act of 1984; but the House of Lords considered the case as though the 2003 Act applied.
A lower court ruled that Collins' language was offensive – but not grossly offensive. The charges were dismissed. The Director of Public Prosecutions appealed without success to the Queen's Bench Divisional Court. He then appealed to the House of Lords.
Allowing the appeal, Lord Bingham of Cornhill ruled that the question of whether a message is grossly offensive must be answered by applying "the standards of an open and just multi-racial society" and the words must be judged "taking account of their context and all relevant circumstances."
"Usages and sensitivities may change over time," he wrote. "Language otherwise insulting may be used in an unpejorative, even affectionate, way, or may be adopted as a badge of honour".
"There can be no yardstick of gross offensiveness otherwise than by the application of reasonably enlightened, but not perfectionist, contemporary standards to the particular message sent in its particular context," he continued. "The test is whether a message is couched in terms liable to cause gross offence to those to whom it relates."
He explained that the law does not criminalise the conduct of one who uses language which is, for reasons unknown to him, grossly offensive to those to whom it relates; rather, it criminalises those whose message is couched in terms showing an "intention to insult those to whom the message relates or giving rise to the inference that a risk of doing so must have been recognised by the sender."
Lord Bingham continued that "some at least of the language used by the respondent was language which can only have been chosen because of its highly abusive, insulting, pejorative, offensive character. There was nothing in the content or tenor of these messages to soften or mitigate the effect of this language in any way."
"Differing from the courts below with reluctance, but ultimately without hesitation, I conclude that the respondent's messages were grossly offensive and would be found by a reasonable person to be so," he wrote. "Since they were sent by the respondent by means of a public electronic communications network they fall within the section. It follows that the respondent should have been convicted."
Collins did not seek to rely on the Human Rights Act of 1998 – which includes a right to freedom of expression. Rightly so, observed Lord Bingham: while the Communications Act interferes with the right, it is a restriction clearly prescribed by statute. "It is directed to a legitimate objective, preventing the use of a public electronic communications network for attacking the reputations and rights of others. It goes no further than is necessary in a democratic society to achieve that end," he wrote.
The Director of Public Prosecutions appears to have brought the appeal to clarify the law. Due to a previous undertaking, the result will not affect Mr Collins and no order against him will be made.
The court noted that the offence in the Communications Act overlaps with a similar offence in the Malicious Communications Act of 1988 which is potentially wider because it is not limited to the use of a public electronic communications network. The 1988 Act criminalises, for example, dropping a letter through a letterbox which is grossly offensive, obscene, indecent or menacing.