Helen, one of the problems with the British 'obsession' with food is that they love it - cooked by somebody else. Most French cuisine is disappointing, along with English, Greek, Italian, Thai, you name it. The difference, it often strikes me, between the UK and France is that diversity has been embraced far more by the British Isles in general than France. Is it not ironic that the short step between say Annecy and Geneva across the border in very much Francophone Switzerland are two culinary worlds. Whilst the former is pretty international for France, the latter is fantastic. Just about all of Great Britain has so much on offer it is sometimes almost overkill. Yet I suspect that in terms of everyday food far less attention goes into what people eat than it does here in France.
I never really got the hang of M&S food. Why spend time buying pre-prepared food when part of the shopping time can be given over to cooking it, knowing exactly what is in it and from where. Wherever I have lived I have been a market shopper rather than a supermarket shopper and see the former becoming far more expensive than the more competitive latter. Just put it down to taste and perhaps whim. M&S is a novelty, let us see if it lasts. If it does I shall eat my hat - I suspect Suzy (see below) has a recipe for me considering what kind of material it is.