AU ?? Sorry about that was working on another item in AU !! Different furniture though !! I typed before checking which was which !!
I'm still none the wiser about what AU is or stands for?!
The design is the same as this
http://www.naturalliving.co.uk/acatalog/Canvas_chair_armchair_bentwood_in_black.html#.VOpDFy4-7IU
but yours look older. I would ask over at the Designaddict forums.
Ah! OK, looks like a perfect match right down to the position of the fittings. Now I've got some better description to go on ("bentwood" etc), it seems like there's plenty on ebay, and if they're only £70 new, I'd consider myself lucky to get £10 locally if I could.
So, I think I'll try for a tenner first, and the a fiver. But the bottom line is, I think it's reasonably safe to assume that I'm not going to be losing out on a piece of vintage furniture which would have attracted 6 figure telephone bids from Dubai if sold at Sotheby's auction
Incidentally, if anyone wonders why I asked in the first place, it's because I nearly put a shabby looking Garrard 301 turntable on Freecycle, and a visiting friend saw it by the front door and said "I'd try that on eBay first", and I ended up getting £250 for it! So as I couldn't find a close match for these chairs on Google, or even ebay at first, I thought I'd ask here.
Once again, thank you all, and particularly to Ipcress for finding that match. Incidentally, how DID you find it? I spend hours doing "similar image search", and using terms like "curved wooden chair" etc.