1971 Britain's First Decimal Coins 5 coin set, Choice UNC

This set of Britain's first decimal coins contains three bronze coins (the 1/2 pence, and the 1 and 2 pence) and the cupro-nickel coins (the 5 and 10 pence.
The information card says that the UK officially changed over to decimal currency on the 15th February 1971 otherwise called 'decimal day' or 'D Day'.