There are several types of biscuits that are similar to graham crackers in the United Kingdom. Some of these include digestive biscuits, shortbread, and oat cakes. All of these biscuits have slightly different tastes and textures, but all are equally delicious. Digestive biscuits are perhaps the most popular type of biscuit in the UK and are usually produced with whole wheat flour, oatmeal, and brown sugar. Shortbread is another popular type of biscuit in the UK and is made with butter, flour, sugar, and eggs. Oat cakes are also quite popular in the UK and are made with oats, flour, butter, and milk. All of these biscuits are delicious and perfect for any occasion.