I heard back from the seller and was about to go and take a look when I realised the frame only has a braze-on for the RD, there is no FD one. Presumably this was made as a TT frame. I can't think how you could set this up for a FD without it looking ugly, using a band-on in the wrong position (or even if using STI type shifters, the cable stops would not line up if a one-sided band-on adapter was used- although I guess that’s a bit less ugly). Anyway as it’s also not that close to me I've had to pass on it, which is probably a good thing, really...
It would be good for anyone who lives somewhere flat, though!