Does anyone know how understanding easyjet and airport security people at Bristol airport are towards infant formula/bottles of water? DD is on nutramigen formula, which cannot be made up long in advance. She will need one feed during the flight if it is on time, and I want to have spare available in case of delays. She has nutramigen on prescription, so would it be worth asking my doctor for a letter to say that the formula, and the water I need to make it is a health requirement?