Thanks ever so much for all the help so far. You've been a fantastic hive of information. I might have some more questions yet.
Does anyone use the BVG app to buy tickets? I've got a phone for which I'm confident the battery will last all day, and I'd rather fire up an app and have a ticket ready to go than to hunt around for change for a machine.
Don't want to buy a 4 day pass as I have free transport on the Sunday with my race number.