Sorry, I thought you meant technical drawings. Yes, I found the replacement pdf before. I'm pretty sure you're right about Beko, and if that pdf applies to my unit, they're obviously wrong.
I think I found two sensors, as you suggested there would be. One is as the pdf shows and as you suggested, wired in through a seal - hence it would be likely to be as per the pics here:
(I sent these links to Beko!)
The other sensor, if that's what it was, was a similar looking cylindrical thing, but it was plugged in to the socket bank. Another plug went to the fan.
I'm sorry - I'll have another look - it's full of food and running on the mains timer again just now. I could take a photo and send it - either attached to your email or I have an online image host I could link to.
But it really wasn't far off the photos in the pdf, although reversed, oddly - on the other side of the fan. Actually, I never tested the pot, since the fridge started working again. I'll start there when I get time - test the potentiometer and see what it's doing. Then, if that's ok and you're fairly sure that pdf applies, I'll risk the tenner for a new air sensor (that it doesn't have, lol).
And you'll deserve an upgrade to excellent. :-)
I'll enjoy emailing Beko to tell them I've replaced the part they say it doesn't have, too.