Pear tree had black leaves

in Fruit & veg
I have inherited 2 pear trees with my new house. The leaves are going black and I don’t know what to do. I think they appear to be 3-4 years old about 6’ tall. Lots of flower and now fruit beginning and I’ve kept it watered it’s in a raised bed against the house. Could someone give me advice and hopefully I can save them. One is much worse. I don’t know how I didn’t notice this sooner. See the pictures I’ve added. Branches seem ok just leaves.

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It's about 6ft tall and in a raised bed. Need to see the way it's grown and the rest of the border/base. I notice in the photo, many of the leaves are droopy. First sign is possible water issue. It's been warm, the bed may be crowded and the whole tree may not be getting enough water to sustain its size and fruit. Leaves can look like that at the end stage before dropping, so need to know if that could be an issue.
Check the tips of branches, are they darkening or showing any signs of any oozing of liquid. That can sometimes happen in the infected areas.
Hope someone who knows more about training fruit trees can offer more advice. Keep a close eye for dried brittle stems. You will need to prune them back immediately if this happens. Remove any fallen leaves to avoid possible spread.