I use the Airflo vest/backpack but it seems to have been replaced with a camo version now, The Outlander Covert Vest Backpack. They do a chest pack version too. At £34.99 direct from Airflo, its a bargain.
Front contains all my boxes, tippet and floatant etc, plus it has 2 built in lanyards for scissors and forceps,. The rear has a flask, box of sarnies, spare socks, gloves and the all important breakfast bars. I just drop all the "backpack" gear into a waterproof liner that can be found for a fiver in Millets or similar.
There is also a company called Maxcatch that has a good range of rucksack/packs at a good price. I follow their facebook page and they seem to get fantastic reviews.
https://www.maxcatchfishing.com/Maxcatch_backpack_fly_fishing_.html
