Fruit Tree ID

I wonder if you can ID this fruit tree for my friend, please ....







The fruit, a solitary one as last year, is cherry shaped )sorry, I had already bitten into it when we decided to photograph it :rolleyes is cherry shaped but not attached with a stalk. It tastes sort of plumish which is what my brother-in-law thought it was. After Mick tasted it he threw the stone away so I couldn't photograph it.

Thank you in advance.

 

definitely looks plumish...:D

 

If its plum like, dare i say it?

Could it be P i s sards plum?:D

 

Spot on, pete ... the Prunus cerasifera, the Cherry Plum.

Thank you .... I shall give Mick a ring. :thumb: