Only a few individuals, but still a few species.
I liked a few of the shots of this one (male Eupeodes corollae)
A reasonable viiew for ID purposes. There were a few of these visiting. (Episyrphus balteatus) [IMAGE'S LINK: https://flic.kr/p/Jo38y7]EOS 600D8350 by Bas Andrews, on Flickr
This only stopped for two shots. (.Meliscaeva auricollis) [IMAGE'S LINK: https://flic.kr/p/J7oJdw]EOS 600D8352 by Bas Andrews, on Flickr
And these were about too (Sphaerophoria Sp) [IMAGE'S LINK: https://flic.kr/p/HAQr6M]EOS 600D8357 by Bas Andrews, on Flickr