Food For Free (Collins Gem) Great pocket size version of the definitive foraging book
Food for Free (Collins GEM) Larger version of the foraging classic
Hedgerow Medicine: Harvest and Make Your Own Herbal Remedies Wonderful book with clear pictures and instructions of how to harvest and use common wild plants as self-help remedies.
The Hedgerow Handbook: Recipes, Remedies and Rituals Excellent pictures to help identify plants as well as some folklore, remedies and recipes
Hedgerow Cookery (Penguin handbooks) Line drawn pictures of plants are pretty dreadful but lots of great recipes when you are sure you know what you have!
The Boxing Clever Cookbook: Twelve Recipe Books in One Not a foraging cookbook but interesting recipes for kale, spinach and other greens which work well for wild foods.
Mushroom Picker's Foolproof Field Guide: The Expert Guide to Identifying, Picking and Using Wild Mushrooms Does what it says on the tin!
Cooking with Flowers: Sweet and Savory Recipes with Rose Petals, Lilacs, Lavender, and Other Edible Flowers Recipes, lotions and potions from a wide variety of common flowers.
The Thrifty Forager A nice book with lots of tips, legal stuff and case studies.. but pictures are more arty than practical and not always good enough to confidently identify thing