What's driving the cost up? Well, to start with, loadsa meat. I only buy free range chicken, so that's expensive. Tuna steaks for four? £7. Ribeye steaks for four? £7.50. Big hunks of meat every evening - no cheapy pasta or jacket potatoes. Then breakfasts - lots more eggs than the normal family, free range of course, about £8. Smoked fish of various descriptions - not particularly expensive, but a heck of a lot dearer than a bowl of cereal.
And finally - I'm not giving the kids any puddings other than fruit, so I want them to have a nice selection. Another £15.
Haven't yet worked out how to get the cost down - at the moment I'm just concentrating on getting used to it. Good job we always go youth hostelling for our hols - the Bahamas are definitely going to be out for a while.
Postscript: The shopping just arrived and it was actually £147 - eek! Having said that, I made a mistake with quantities of beer and have ended up with 60 bottles. I do like the odd beer, but that's ridiculous.