Before you do anything look at the pocket survival kit reviews on this site and then follow the link to U.S. Rescue and read everything that they have to say very carefully. If it's a straight pocket survival kit you want then you could do a lot worse than buying a Ritter Survival pack, A fireball firestick and one of the new B.C.B. wiresaws from Outdoor Code (as you are in Europe). Repackage the whole lot into a tobacco tin or two. Throw in a couple of lighters and some purification tablets. You might also want to increase the size of the fishing kit.