I'm not reg on Facebook so can't, I would maybe tell them that given that ocado and Waitrose both stock and home deliver the bread, it's looking a more appealing shopping choice than trailing all the way to morrisons and one that will be more widely advertised on social media - I generally find the threat of lost profits has more of an impact with big supermarkets than appeals to their better natures , which I'm not sure they've got!
Ps ocado seem to cover most of the country - I use them in London as does my mother who lives in the wilds of derbyshire