white flowered garden shrub

white flowered  garden shrub

Observation - white flowered garden shrub - UK and Ireland. Description: Not wildlife as such but a shrub / bush in our garden that has produced loads of small white flowers this week, which small bumblebees seem to love & was hoping someone (like Steve?) could ID for me please...

Not wildlife as such but a shrub / bush in our garden that has produced loads of small white flowers this week, which small bumblebees seem to love & was hoping someone (like Steve?) could ID for me please...