Bee Buzzing in Hypericum (Rose of Sharon?)

Been told this bush can be called 'Rose of Sharon'. Searching for that does bring back this yellow bush on sponsored links but also lots of pink and blue flowers of a different type. The sponsored links use the name Hypericum.

I'll go with either. It's been in our garden since we moved here. It's getting too big and unruly and needs a prune which I will do this year. However that will only be after the flowers go.

The bees love this plant. You hear the bush positively buzz. There is one in this shot. There were easily another 15 I was aware off.