Umknown fly - help with id appreciated

Umknown fly - help with id appreciated

Observation - Umknown fly - help with id appreciated. Description: I have looked for this through my books but not been succesful. Any help would be appreciated, as I am trying to document the wildlife in my garden. It is small, about 4mm maximum in length. Tried to get the best quality photo as possible.

I have looked for this through my books but not been succesful. Any help would be appreciated, as I am trying to document the wildlife in my garden.
It is small, about 4mm maximum in length. Tried to get the best quality photo as possible.