Can you please identify this mosquito-like insect? I've seen these insects before (here in Cambridge, UK) and thought that they were probably mosquitoes, but they don't make the annoying noise that mosquitoes do (they fly similarly, but silently):  and don't have the long mouth which mosquitoes use to sting you. Sorry for the poor photos, I don't have a camera with a macro lens anymore, and it's night-time. It's casting a strong shadow as you can see in the second photo.

It is most certainly a fly from Chironomidae, which belongs to the same suborder (Nematocera) as Mosquitoes (Culicidae). They have an overall resemblance to mosquitoes, but lack the large sucking mouthparts, and often have the large feathery antenna that are seen in your pictures. Some species are found in large swarms in early spring (but also later in the summer). Larvae can be found in most freshwater, and are called _bloodworms_ due to red colour (high in hemoglobin, adapted to live in oxygen-poor sediment environments)

I doubt that the exact species can be determined from these pictures though.