I really wish BA had a similar arrangement with Sainsburys/BP so that Nectar points would also convert to Avios! In London, Sainsburys is the dominant supermarket format and the only Tesco near us is a pointless Metro format that never sells anything you need and seems more like a bread and milk type stop than a proper food shop hence a lot of people miss out on opportunities like this.

Not on-topic I know and a bit of a rant so apologies