Watch List notes:

George VI, crown, 1937; Elizabeth II (4): crowns (2): 1977; 2007; Britannia two pounds, 2000; five pence, 2017; Cook Islands, dollar, 1995, with image of the Queen Mother and daughters princesses Elizabeth and Margaret; with Elizabeth II, ten pence pieces (2): one 2007, the other an error piece with the reverse of crowned lion to both sides (not a brockage), generally extremely fine to uncirculated (8)
The last interesting, mistrikes and error pieces are seemingly becoming increasingly desirable.

Estimate: 30 - 50 GBP