
[Conwy is the name of the town as well as the county, just in case you're confused, Big Ted]
Technic'ly this may really be "St Mary and All Saints" but nearly every reference to the church is as "St Mary" (apart from this one on the sign) so I'm going with that!
I went inside here and had a nice chat with the people who were guiding visitors around. They let me sit on their font (which is really high up; I felt quite dizzy) and then I found two mouses - one on the altar rail and one on the stretcher of a desk in the memorial chapel! (The mouses may have been pointed out to me so I could "discover" them).