Shackleton
Central Defender
You would be surprised at how much power the big supermarkets actually have. believe it or not some actually name their own buying price, because of their size they brutally bully suppliers, ordering then cancelling massive orders then renegotiating a price. Its a joke because this happens to the same companys time and time again
I negotiated a massive contract with Sainsbury's once and had to manage it (for books/music/video games) so have the battle scars!