Had this just over a month ago. I went down to accident and emergency just before 12 am on a Saturday (also know as the emergency department) as I was having really bad cramps because of my IBD (ulcerative colitis) I got triaged within an hour and had blood tests done within an hour after. Only saw a Dr after 7 or 8 in the morning and then was with her an hour at most, went for an X-ray and then had to sit for maybe another 5-6 hours to find out the results of a blood test that they do at the hospital. They were thinking of admitting me to hospital but we're waiting on the blood results so it's not as if me just going home was going to help myself.
While I sat waiting on the Dr the last time, I went and asked twice because I hadn't had word for hours. I also didn't have anything to eat for 24 hours as I didn't have an evening meal and I couldn't use a vending machine as I had no cash or card as I don't think I would be there 16 hours.