Some sort of fly?

Some sort of fly?

Observation - Some sort of fly? - UK and Ireland. Description: Im new to this and cant even make a guess other than some sort of fly? It looks longer than the aver

Im new to this and cant even make a guess other than some sort of fly? It looks longer than the average house fly. It has some slight iridescence to the wings when you zoom in.
Looking for suggestions please.