Whilst I appreciate the technical arguments about the legislation and similar, fundamentally immigration is a complex area of law and one which can have extremely severe consequences if mistakes are made such as deportation from the UK. It is not to be trifled with.
Consequently, unless someone is a qualified immigration advisor (and I don't think we have any on the Forum, if we do by all means shout up), the expectation is that only very general statements (i.e. guidance) would be given by Forum Members. Someone pointing to a page on gov.uk and saying "These are the things that could happen in this situation, see this page on gov.uk, but you'd need to speak to an adviser to know more about your specific situation" would be fine for instance. Equally, simply saying "I don't know, see these pages on gov.uk and here is register for immigration advisers" may be the more appropriate response.
We are, fundamentally, a railway forum and so dealing with ticketing matters is more in our wheelhouse (and we actually do have members with experience of the relevant legal processes who can point out if we're going wrong) and is not regulated in quite the same way as immigration advice is.
Again, appreciate the technical arguments and most likely none of what we do here would actually be captured by the act in question. But I'd really rather not run the risk. So generalities are okay but I'd really rather not see anyone saying: "In your situation, you do/don't need to worry because x applies" and even when speaking in generalities please link it back to some sort of official source (basically, gov.uk).