Good Quality Rucksack / Backpack (off the bike, hiking)

Not really relevant to the OP but just got an Ortlieb Messenger off Wiggle and wouldn't hesitate to recommend it. Absolutely cavernous, seems like it'll be waterproof as a frog sphincter, really comfortable and the typical, expected quality.

I was looking at the other messenger backpacks - BigTop, Restrap etc but couldn't justify the spend. The Ortlieb is much more utilitarian (it consists of one big BIG pocket) but at £70 I',m more than happy.

I just bought an Ortlieb Messenger, it's also just below the size limit for Cabin bags on Ryanair.