Watch List notes:

Elizabeth II, 'city series' one pound coin sets, each comprised of two pound coins (4): 2010, London and Belfast (2); Edinburgh and Cardiff, 2011 (2); 12 coin sets (3): 2010 (2); 2011, five coin sets (2); all incorporate one pound coins designed by Stuart Devlin; with a set of the four 'city series' of pound coins together held in plastic holder (SD pp. 280-281), one London / Belfast set signed by Stuart Devlin, mint state (lot)
A letter from the Royal Mint explains the medallist's entitlement.