The Coinage (Measurement) Act 2011 (c. 17) is an Act of the Parliament of the United Kingdom.
It amends s.1 and s.3 of the Coinage Act 1971 to allow the method for measuring and confirming the weight of coins to be set by proclamation, rather than the fixed statutory method of using a test sample of less than 1 kg in weight. This was necessary in order for the Royal Mint to strike 1 kg gold and silver coins to commemorate the 2012 Summer Olympics in London.
References
Coinage (Measurement) Act 2011 Wikipedia(Text) CC BY-SA