This morning, while on my constitutional, I saw a bush in someone's front garden with some fruit on it and thought "I'll have one of those!" This is what the bush looked like.
When I got home, I took some photos. I nicked another Crabapple for comparison.
I then cut the fruits open.
Quinces are very sour, but the frosts had sweetened it somewhat so it was edible raw. A checkout lady at the Co-op told me that it was a Japonica Quince later in the day.