When you exit Coventry station, up ahead on your left is a bridge (there are steps leading to it if you follow the station round). This is Warwick Road, the bus stop leading to campus is on it. You'll want the #12 Travel Coventry bus, which will either say University of Warwick or Leamington Spa with via Uni of Warwick underneath. The U1 doesn't run through Coventry on weekdays, so disregard this. They should be around every 10 to 15 minutes, and take about 15 minutes to get to campus. You'll need exact change though, I don't remember the price of a return but it'll be 2 quid something so just have some 10 / 20ps ready. There are 3 stops on campus, you want the second, which is where the majority of students on the bus with you will get off. On your right is a 6 storey building running parallel to the road (Humanities), up ahead on your left you can see the sports centre and car park. To get to Maths & Stats, when you get off the bus walk back a bit, on your right is a small footbridge leading to some modern buildings, that's M&S. It's signposted anyway if you do get completely lost.