As for teams from different universities (Stirling, Edinburgh, Heriot-Watt, Glasgow, Aberdeen), each of them usually has their own BUCS teams at different league levels. Usually BUCS (British Universities & Colleges Sport) is the organization that manages inter-university competitions in the UK. If a team plays in BUCS Scottish Division 5, this usually means that it is a varsity or college team competing in BUCS. I wrote about this simply and used the plagiarism checker for the project, I found https://edubirdie.com/plagiarism-checker for this. For an accurate answer to your question, it is recommended to refer to the official sources or websites of universities / colleges and BUCS for up-to-date information about the teams and their status. This should help you.