The Royal Mint do seem to be having problems with the quality control of their new coins. Besides the well popularised undated mule of old obverse and new reverse dies for the 20p there appear to be production problems.
I came across this coin in change the other day that looks to have been made from an obverse die that was breaking up or suffering from some damage that resulted in two raised lines coming down from the queen's nose.
On top of that there is evidence of die clogging on the reverse obscuring some of the raised pellets that border the shield.
