Last year when doing up our flat on Green Lanes (slightly over the southern border, we're just in Hackney) a couple of doors we ordered were the wrong size for what we needed.
They're good internal doors in unfinished oak. Not taken out of the wrap, but our suppliers wouldn't do a refund. They are these doors(manufacturer's website) in the size 1981 x 838 x 35mm (33").
We have two doors, which we'll sell for £30 each or £50 for the two. Would have to be collected though, I'm afraid.