Mrs. Tittlemouse 50p (2018)

The tidy wood mouse from the 2018 Beatrix Potter set, with 1.7 million in circulation. That puts her just above Peter Rabbit and Flopsy Bunny from the same year and below every Beatrix Potter coin from 2016 and 2017, Jemima Puddle-Duck's 2.1 million included, so finishing the 2018 set is the real test of a Beatrix Potter collection.