All done. I opted for the local anaesthetic which was horrible and my nose and throat still feel itchy and uncomfortable, but it’s gradually wearing off.
It wasn’t a pleasant experience, but manageable, even for a wuss like me. The nurses were lovely, the endoscopist less so 
He didn’t say anything to me after, just walked away and called over to the nurse, ‘Normal - discharge her’ !!
I had had to wait a long time as the person before me was apparently more complicated than they anticipated, so I think he just wanted me in and out quickly. I saw him afterwards scurrying towards the canteen so maybe he was ‘hangry’!