They're not very common, never found one in the wild, but there's one in the communal forest garden near me.
They're inedible until they've "Bletted", thats softened by being frosted.
Picked a bag of Medlars and Apples last year but left the bag outside overnight. When I checked it the next day, the apples were still there, but the rats had pinched all the Medlars.