In reply to Mick B:
Another decathlon pack - https://www.decathlon.co.uk/p/men-s-easyfit-rucksack-50l-black/_/R-p-309807
Great bag for cragging and traveling. Very good strap and waist strap system that makes carrying weight much more pleasant for longer walk ins (I've found that this is where climbing specific packs like the dmm one above fall down). 50L sounds like a lot but not as huge as it sounds.
Plus for £50 its a bargain. As with most decathlon stuff, you get well thought out and designed kit that is made cheaper than their name brand alternatives.
Post edited at 10:07