Thanks for the great advice - those fare rules do make sense now, so I'll try to firm up my travel dates!

From the way the BA fare explorer works though, it looks like the inbound fare is identical to your outbound fair, so long as the class is available?

In which case, with the sale offerring a £50 discount on each sector, since the only date that change now looks possible on is the return, the £50 change fee, plus the £50 difference from sale to regular fare, would equal the £100 I had saved.

I guess I'll have to see how its looking by the end of Jan...

Thanks again,

Dan