|Fly, family Muscidae. In my light trap in Hayes on 25 August 2015|
In this photo you can see one of the halteres quite clearly. It's the yellow projection just under the root of the wing. Flies have only one pair of wings (whereas wasps and bees have two), and in place of the second pair are these counterweights on the end of stalks, which vibrate in such a way as to offset the movement of the wings and thus smooth out the creature's flight.
|Cranely, family Tipulidae. In my light trap in Hayes on 5 October 2015|
|Hoverfly, Syrphus vitripennis. In my light trap in Hayes on 15 September 2015|
|Broad Centurion, Chloromyia formosa. In my light trap in Hayes on 18 June 2015.|
|Soldier Fly, probably Dull Four-spined Legionnaire, Chorisops tibialis. In my light trap in Hayes on 18 June 2015.|
|Flat-footed Fly, Opetia nigra. Female. In my garden light trap in Hayes on 13 August 2015|
Although it's called a Flat-footed Fly, when I looked it up I found that it is the only member of its genus which does not actually have flat feet.