My ivy is in full flower at the moment and I have never seen so many flies, bees and wasps visiting at the same time. One lone fly caught my attention as the orange on its wings and face parts almost glowed even on a dull afternoon:
After a bit of searching I found the identification on the GardenSafari site. It would appear to be a Mid-day fly. This one doesn't normally enter houses. It lays it eggs on dung. Can't remember ever seeing this particular type of fly before now.
Pollen gathering spiders
3 hours ago