I stood by the Ceanothus for a few minutes, taking pictures of the flying insects that landed on it. There were more species than the ones shown below, but a number of insects - notably the hoverflies - were too fast for me.
I think the photos immediately above and below show a visitation from a Honey Bee,
Apis Mellifera.
I wonder whether you knew that Bumblebees, like the one above, used to be known as Humblebees ...
this was news to me.
The creature above is a Hoverfly. Unlike bees and wasps, it only has one pair of wings, and so is a true fly. This one has proved difficult to identify: Britain boasts some 270 known species. I suspect this is a female, because in males the eyes are close together, and you can make out a gap (with wide Vertex) in the photo above.
I am wondering whether the bee in the photos immediately above and below is
Bombus hypnorum. It certainly has the foxy-red thorax, black abdomen and white tail. I have included the photo above to show the tail. It was a highly active insect and had no wish to pose for the camera! You can see from the yellow sac just how much pollen was being collected. I don't think it was stripy enough for a Carder Bee.
Above: a Honey Bee, full frontal, hard at work ...
Below: the Honey Bee, end on!