The UK （A） g _______ replaced its one pound notes with a coin back in the 1980's， but the circular one pound coin is pretty easy to copy. It is thought around 3 （1） p_______of the coins in circulation today are fake， and so action is being taken to stop that percentage getting any higher.

The solution？ Replace the circular coin with a 12-sided （B） d_______that incorporates the anti-counterfeiting tech we already have embedded in notes.

The new coin， developed by The Royal Mint， isn't set to come into （C） c _______ until 2017， but when it does， it promises to be incredibly hard to copy， having multiple layers of cutting edge （2）

t_______ . It's even being touted as the most secure coin in the world.

As well as being constructed from two different metals， the coin will include ISIS – the Integrated Secure Identification （D） S_______. Specific details about exactly what iSIS is havent been forthcoming， but it is thought to offer a way of checking a coin is fake just like you can check a bank note is fake already. Such a test could be incorporated into vending （3） m_______or a counter top machine to use in retail stores and banks.

ISIS has cost ?2 million （$3.3 million） to develop， but its surely going to cost a lot more than that to （4） r_______a circular coin with a 12-sided one. Every machine that accepts today's pound coins will need to be upgraded， and that （5）

u _______ is probably going to cost more if it has the relevant iSIS test incorporated. Three years isnt exactly a long time to plan and carry out such upgrades， either， so I （E） s_______something may change before the new coin enters circulation.

（A， B， C， D， E FOR CROSS， 1， 2， 3， 4， 5 FOR DOWN. The first letters of the absents were given）