I like Kallo stock, too, or Marigold Bouillon powder. Kallo have a low salt one which is good for littlies.
Packed lunches:
Wraps seem popular with just about anything in - cold veg sausages or quorn pieces, hummus, grated cheese, grated carrot, beans or chickpeas, coleslaw, philadelphia, etc
Pots of things like pasta salad, pesto rice, potato salad, bean salad are nice
cold pizza or quiche or tortilla
hard boiled eggs
mixed nuts and seeds (if allowed at school)
mini pots of hummus or sour cream and crudites like cucumber, carrot, red pepper, or breadsticks or pitta to dip
yogurts, dried fruit, flapjacks, scones, fruitcake, malt loaf, fresh fruit
any good?