Hi Firstly, may I announce my arrival on this forum... I have been reading it for months but never got round to signing up. You have all provided quite a bit of useful information and humour already! My first post concerns a journey I wish to carry out this weekend. On Friday morning, I need to leave Redhill station on the 0723 to London Victoria, and from there travel to Warren Street on the Victoria line. At this point I need to break my journey for some lectures at uni until roughly 1700hrs, at which point I need to get to St Pancras (via tube if possible, even though it's not far, as I will have a suitcase) to catch any service that arrives in Flitwick at around 1800hrs. I then need to return on Sunday evening, leaving Flitwick at roughly 1700hrs to return. However, I will not need to go via Warren Street, as there are no uni lectures on a Sunday! I don't know the exact timings, since I may need to help my friends pack up a venue we will have been using over said weekend. My first question is what the cheapest and most flexible way to do this would be, with my 16-25 Railcard. My second question is whether or not there would be engineering works meaning a more specific ticket I purchase (if indeed I need to) would be invalid. The reason I ask is that even though it sounds a basic problem, I cannot work it out online on either NRE or Southern's website (and ideally I'd like to know what to ask before I enter the ticket office). I also need to book the journey at least the day before. Thanks for your help. I hope that makes sense.