No, can you? What I can tell you is that someone I know at M&S told me over a year ago that less product was sold per day on the entire BA short haul network than at just ONE of their midsize London locations (in a day), and their actual cost was higher. Also this person mentioned that the entire venture was detrimental to their brand and a reputational risk, as they were afraid that all the negative experiences experienced by passengers on BA flights would be attributed to M&S rather than BA, even when the majority of such things were out of M&S's control.