Fish and chips are a classic British staple and a great option when feeding a large group of people.  Depending on the size of your group, you can usually calculate that each person will require around two to three pieces of fish and around 100g of chips per person.  For larger groups, you may want to increase this amount so that everyone can have enough to eat.  When making fish and chips for a larger group, it's also important to consider the type of fish being used - larger portions might require thicker fillets to make sure the meal is cooked through properly.  Additionally, if you are serving the dish with sides such as tartar sauce or mushy peas, make sure you factor in enough for everyone!