From the London Gazette:
Whereas it appears to Us desirable to order that, to commemorate the
two-hundredth anniversary of the birth of Charles Dickens, there
should be made at Our Mint coins of the denomination of two pounds in
gold, in silver, and in cupro-nickel and nickel-brass, having joined
concentric inner and outer sections, being in gold with a different
coloured gold outer section, in silver with a gold-plated outer
section and in cupro-nickel and nickel-brass with a cupro-nickel inner
section and a nickel-brass outer section
The design of the said coins shall be as follows:
'For the obverse impression Our effigy with the inscription "ELIZABETH
* II * D * G * REG * FID * DEF *", the denomination "* TWO POUNDS *"
and the date "2012", and for the reverse a silhouette profile of the
writer through the titles of his works, greater prominence being given
to those that are more well known, with the inscription "1812 CHARLES
DICKENS 1870" to the left. The said coins will have a graining upon
the edge and in incuse letters the inscription "SOMETHING WILL TURN
UP", save for the gold coin where the incuse letters will be
accompanied by a plain edge'.
http://www.london-gazette.co.uk/issues/59938/notices/1456983/from=2011-10-01;to=2011-10-21;all=design+coin