branwen jeffreys, bbc news, manchester.have been minted, and will be circulated from december. coins featuring the late queen will remain legal tender. hywel griffith reports. freshly minted, and coming to a till near you. the new 50p is the first of the carolean coins. for now, they're under tight security — you need special permission just to touch one. but from december, they'll circulate alongside the queen's coins, which won't be withdrawn. keeping the currency current is a significant moment. martin was the man charged with creating the image and getting everything in proportion, knowing eventually his work would end up in millions of pockets and piggy banks. you don't want to make it, for example, too cheerful because this is a serious... this is a very serious symbol. and yet it needs to be light enough to put across his humanity. it's getting in the subtlest of possible ways those emotions, rather than, as it were, ears or nose or eyes. these days, cash isn't really king. only 15% of payments are used using coins a