Tree identification- damson?

in Plants
Hello. We moved to our house 2 years ago and today for the first time I’ve seen some fruit growing on a tree. Would love to know what it is and I’m secretly hoping it’s a damson. Maybe pigeons got the fruit in previous years and I didn’t notice as wasn’t at home as much! Photos attached, thanks in advance. 




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Cant wait for this years damson jam!
East facing, top of a hill clay-loam, cultivated for centuries (7 years by me). Birmingham
East facing, top of a hill clay-loam, cultivated for centuries (7 years by me). Birmingham