Mystery (to me) hedgerow fruit

Out with my pooch a couple of months ish ago I spotted a weedy-looking hedgerow plant about 2ft tall with plenty of green fruits. They slowly turned a brownish colour and are now an orangey-red colour. None appear to have been taken by the birds but the cherry trees above it are striiped of fruits daily.
Curiosity got the better of me just now so I grabbed a sprig -

Any ideas?


Inside -
It looked like it might be tasty, so throwing caution to the wind I ate the other half.
It was quite sweet with a hint of bitterness

 

Looks like a wild cherry to me, but you say it was different to the cherry trees nearby?

 

Never tried Duracell batteries, I'll take you word for it.

Obviously a stone fruit, prunus of some kind.
Its very cherry like if its ripening now.

 

There are loads of bird cherry trees in the area and the ground below is strewn with the discarded pits.
The cherries are bright red and about 1/2 the size of the one above. There's barely any flesh on them, just a stone with thick skin. I try one occasionally - very bitter and not nice, but the birds love 'em.
The also hang in bunches whereas on the little plant I spotted they were single fruits dotted along the branches. It's growing in quite deep shade.
I'm wondering if it's of the plum family.
I just had the other half and it was more plum than cherry taste.

There are places I know where damsons and bullaces grow around the fields, so I'll see if I can find a match when I'm out tomorrow.

What does surprise me is the lack of sloes this year. They flowered really well but I can barely see any berries forming.

 

Maybe this?

Cherry Plum (Prunus cerasifera) - Woodland Trust

I love the bit about Dr Bach’s flower remedies for people who are “in fear of losing control of their behaviour”.

 

Could well be @Tidemark thanks! the leaf is a good match as are the flowers from what I remember.

I see bullace and damsons too on my walks too but they've not caught my eye yet as they're still green. I'll make sure to look tomorrow.
It was the fruits turning from green, to a brownish colour then orangey-red that got me wondering and I can't recall seeing one before.

Certain 'flower' remedies had the same effect on me too when I was a teen

 

I agree on cherry plum. Cherries have a longer leaf. They make good jam.