Watch List notes:

Bank of England, David Henry Fitzroy Somerset (1980-1988), £10, ND (1991), serial number U01 187990, brown and multicoloured, Elizabeth II at right, lily at centre, reverse brown, Florence Nightingale and the hospital at Scutari at centre,, (EPM B346, Pick 379b), in PMG holder 64 EPQ Choice Uncirculated and a first prefix for type; a spectacular 'extra paper' error to boot.

Estimate: £350 - £450