If someone intentionally misses or breaks a fast with no valid reason then they must compensate for this in one of two ways. They must either fast for 60 days or, if they are unable to do so, they should feed 60 poor people with two meals for one day. This practice is known as Kaffarah and is calculated according to the average cost of two meals a day.
In the United Kingdom, we have estimated the total cost of Kaffarah to be £300.