I've looked up some photos of perry pear varieties. What we've got is definitely not a wild pear tree and I reckon it is something like a 'Huffcap' variety of perry pear. The pears are small, roundish, yellow when ripe, hard, but sweet and falling off the tree in their hundreds! I have just bought a fruit crusher, I already have a small press and some demi johns. Going to give it a go!