I took several shots of this beefly yesterday but this was the only one that was clear.
It shows the underside. The bee fly has a long proboscis that extends deep into flowers to draw up nectar.
I will look for it again today and see if I can get a photo of its topside.
I sent a pic of the Beefly off to a conservationist. Evidently it is the Dark-edged Beefly Bombylius major and is quite common.