Watch List notes:

Proof Sets, Blue Sets (15) 1983, 1984, 1985, 1986, 1987, 1988, 1989 (2), 1990, 1991, 1992 (includes the EU Presidency Fifty Pence), 1993, 1994, 1995, 1997 nFDC to FDC, some sets with toning, in the Royal Mint cases of issue

Estimate: 120-220 GBP