I'm Uk based too and I had an endoscopy yesterday. Our health authority has subcontracted the Endoscopy service out to Prime Diagnostics and it was carried out at a community health centre. They inserted the tube through the nose after an anaesthetic spray up each nostril, and said that accessing this way rather than through the mouth enabled a much finer tube to be used. The spray numbs your nose/back of throat which makes it a bit difficult to swallow, but it's bearable. They offered sedation and I had it, though several other patients didn't. That was via a canula - one injection and it just relaxed me. I was fully conscious though my recall afterwards wasn't spot on, and I was able to watch what was happening on a screen. It doesn't take long, less than five minutes I'd say, and although it's a bit uncomfortable, it didn't really hurt, even when they took a couple of biopsies. I just felt very detached about it all. If you have sedation they like you to hang about a bit afterwards, but my appointment was for 9.15 and I was home by 11.00am. I wouldn't get stressed out about it again, though I wouldn't look forward to it. You'll be fine. If you feel so inclined, have a look on You Tube under Prime Diagnostics and you can see the procedure being carried out. Or perhaps you might not want to do that.