i do most of ours in lidl then extra bits in tesco-things we cant get in lidl.theres 2 adults,3 dc in our family.i make a weekly menu plan,then its weekly things like cat food,bread,milk etc.plus packed lunch bits.were all veggie which makes things cheaper.i buy big box of washing powder,dishwasher tablets.i write whats in the cupboards,freezer/fridge and make my menu plan around that.
today i brought-
milk,bread,cheese,juice,biscuits,yoghurts,grapes,banas,apples,satsumas,bread sticks,potatoes,onions,sour cream,quiches,tomatoes,lettuse,cucumber,tomato sauce,veggie burgers,buns,cheese slices(dd's birthday dinner!),toothpaste,babybelles,breadsticks,spag bol sauce,tinned new potatoes,nappies,houmous,celery,eggs,croissants,pain au chocolat,jam,ummmmmmmmmm.theres more but i cant think.
anyway-came to £50 something.normally we spend between £70-£80 a week.