Ribwort Plantain - A common plant of the roadside, perhaps not quite as amazing as the Greater Plantain of yesterday. I guess as kids we all picked these to make 'guns' out of them, so we're all familiar with the flowers.
Now I thought this was going to be an easy identification - it was big and having seen many before. I thought it was a hoverfly spp but now think it is probably a fly spp. I thought it had hornet-like features and now think I'm going mad!