Hello O.P here.
Thank you for all the posts and what has been a very interesting discussion.
Mmarmite - I don't necessarily agree with all of Shapely Prose, but there is some brilliant work on there. Also your post about Headless Fatties, I remember reading a brilliant essay on it here: www.charlottecooper.net/docs/fat/headless_fatties.htm
I do think there is a very big overlap between feminist and class issues here. If you are poor, don't have much time, don't have access to public transport, don't have the energy to carry big bags of vegetables, you're going to find it harder to get healthy food which is often in expensive supermarkets/shops far from poor areas.
There is (as whoever posted about The Road to Wigan Pier pointed out) food as an affordable treat. You might not be able to afford x amount of nice things but you can have a fish supper as a "treat" and something to look forward to.
Finally as Vezzie said, I am extremely uncomfortable with the pressure on women to make themselves smaller in the world.
There are so many ways that women who express their wants and desires are demonised in this world: demanding, bossy, slut/nympho and of course, greedy.
Because good women should nibble on their food, almost apologetically for even needing sustenance and not have a body deemed unacceptable by society and if they dare to do so, then they should hate themselves for it.
Whoever posted that link from elsewhere on Mumsnet, shows the other problem here, that women are being made complicit in all this, to scrutinise and police the bodies of other women.