The Royal Mint have just released most of the mintage figures for 2015 coins. They have been added to the appropriate pages. Here is a summary:
1p with 4th portrait – 154,600,000
1p with 5th portrait – 418,201,016
2p with 4th portrait – 85,900,000
2p with 5th portrait – 139,200,000
5p with 4th portrait – 163,000,000
5p with 5th portrait – not yet known
10p with 4th portrait – 119,000,000
10p with 5th portrait – 91,900,000
20p with 4th portrait – 63,175,000
20p with 5th portrait – 131,250,000
50p with 4th portrait and standard shield reverse – 20,101,000
50p with 5th portrait and Battle of Britain reverse – 5,900,000
£1 with 4th portrait and standard shield reverse – 29,580,000
£1 with 5th portrait and standard shield reverse – 63,475,640 (this figure is probably an error and is likely to be the figure for the coin with the Royal Arms reverse, below).
£1 with 5th portrait and Royal Arms reverse – not yet known, but see above.
The Check Your Change admin is Mr C H Perkins, publisher of numismatic publications in printed and eBook format. Author of "Collectors' Coins - Decimal Issues of the UK" and other books on British coins and related subjects.