Several running around on the trunk of a Salix sp.
No interactions present.
Hi Dave looks like a Tachydromia sp...somethig along the lines of T. arrogans. I find alot of these type in my veg plot and locally on a brownfield site.
There is a key here. http://www.dipteristsforum.org.uk/documents/Tachydromia_Revised_Key.pdf
Thanks Christian. I've kept it just in case so will see if I can work it through the key, now I know where to start!
Lat/Lng: 51.53997, -3.49523
OS grid ref: SS963834