I worked on an A&E reception and everyone, regardless of how they arrived, had to go through triage first. Obviously if you were criticially/seriously ill it was done as they assessed you, but *most* ambulance patients either wait in cubicles for an hour or so for a Dr to see them, or get put in the waiting room to wait their turn. And where I worked, if you came in 9-5 on a weekday from your GP with an xray request for a ?# arm then you went straight to xray and were only sent to A&E if the xray showed a fracture.