im not doing biosciences so i might not be of much help but am doing a level bio now but from what i’ve heard from other ppl studying it - bangor is really good for anything in the environment department and i believe it has lower entry requirements than the other universities u have listed which is good as it’s a good idea to have a spread of different entry requirements when u choose your top five and all the other universities are really high on the league tables which is great, st andrews is an amazing university and i’ve heard great things about lancaster but the train station there is quite a bit of a way from the university itself, a big thing to think about is transport links so how many changes for trains, how much are the fares, how long is the walk, is the walk particularly safe especially when u are walking in the winter months, hope that helps and hope this post acts as a boost for u (if that works on this site i’m new here lol)