Having a well-stocked store cupboard really makes your life easier. Here is a list of things that I find I use again and again:
Condiments, Oils and Vinegars
Dijon mustard, English mustard, whole grain mustard, olive oil, ghee, coconut oil, rapeseed oil, sesame oil, chili oil, red wine vinegar, white wine vinegar, rice vinegar, balsamic vinegar, mirin, soy sauce (dark and light), fish sauce, peanut butter, horseradish
Flours
Whole wheat flour, corn flour, gluten-free flour, white and whole meal spelt flour
Sweet
Honey, agave, maple syrup, date syrup, unrefined caster sugar, dark and light brown muscovado
Dried fruit
Dried apricots, dried figs, dried prunes, goji berries, dried dates, raisins
Nuts and seeds
Ground almonds, hazelnuts, cashews, pumpkins seeds, sesame seeds, sunflower seeds, pine nuts
Rice and Pasta
Dried whole wheat pasta, egg noodles, rice noodles, brown basmati rice, quinoa, pearl barley, brown rice, whole wheat couscous, red camargue rice, wild rice
Beans and Pulses
Tinned cannellini beans, tinned kidney beans, tinned sweetcorn, tinned butter beans, tinned tomatoes, coconut milk, chick peas, puy lentils, red lentils
Spices
Ground cumin, ground coriander, curry powder, crushed chillies, bay leaves, mustard seeds, onion seeds, cardamom, ground cinnamon, smoked paprika, five spice, cayenne pepper, rosemary, thyme, nutmeg, cloves, sea salt, black pepper
Other
Tahini paste, bouillon powder, chicken stock cube (reduced salt), cocoa powder, oats, bicarbonate of soda, baking powder, vanilla essence, dark chocolate, tomato puree, miso (brown and white), Marmite
Freezer
Peas, sweetcorn, spinach, mashed potatoes cubes, chilies, bananas, prawns, berries, frozen yoghurt