That sounds like the sort of thing I'm after. Do bags tend to have a universal fitting mechanism, or do you need to choose your bag to fit your rack?
I've got a TorTec Tour Ultralite, so not sure how much that'll limit my options.
I'm back to
Evans on Sunday as I've booked myself on one of their 'Introduction to basic bike maintenance' hours, so I'll check with the guys in the shop to see what they can suggest, but thanks for all the advice, everyone!