I am not sure, but I think this is a cotoneaster. It had abundant berries in September 2020 although quite a bit of dead wood. In February this year I noticed that the tree appeared to be going rotten at the base, but the berries were still on it. Since then the tree has gone from bad to worse and I've attached a few photos which show the current situation. It looks dead and hasn't leafed up much this year. I scratched at a couple of the branches and they look dead. Leaves that have appeared have been curled, blackish and dried. Can anyone give me advice on what might have happened and whether it may come back with hard pruning. Any ideas gratefully received.