To add to that, the term “disturbance” is defined in the case law as a factual, specific analysis. Every time a judge considers whether something makes a disturbance, in section 175 or 176, they're going to take into account everything that goes on. With respect to the borderline instances, pointing to the fact that religious services are different is instructive in the court process, at the police level and the judicial level as well.
Evidence of meeting #73 for Justice and Human Rights in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was 176.
A recording is available from Parliament.