4 white petals

I came across this 8ft tall scruffy shrub today growing tangled up with a Sorbus torminalis in a semi-wild area of a riverside park Sidmouth, Devon, England, , can anyone help identify it please? For scale, leaves are about 2 inches long.

 

Euonymus europaeus (Spindle tree).

 

Thank you, I don't know I didn't think of that, too used to looking out for the berries later and forgetting what the flowers are like possibly.

 

He. He. Did exactly the same thing, when I saw it in Italy.