I can't see how the EWFL people were spending £8 per meal on microwave rice .
If it's about £1.50 a pouch and each pouch easily serves 2/3 as an accompaniment, so that would suggest that they were having at least 5 pouches between the 4 of them greedy bastards.
OP If you cut down on your wine, and try and save with food a bit, you could easily cut your bill by £300 or more. That's thousands a year.
What are you spending so much money on apart from wine if you don't eat meat? Do you eat fish? That can be very expensive - can you try cheaper varieties, or frozen? I think the EWFL people were spending £15-20 on enough fresh cod or salmon for a family meal - frozen would be about a fiver so loads cheaper.
Are you buying lots of fruit or expensive vegetables like asparagus? Try to shop seasonally when things are much cheaper.
If you buy branded goods, try to only get them when on offer and stock up, or try supermarket brands. There's lots of branded non perishable goods that are on offer so much that if you stock up when you see an offer, you never need to pay full price. Things like coffee, teabags, cat food, tinned tomatoes/beans etc, sauces microwave rice, soup, crisps.
If you shop online, if you rotate round the supermarkets, you can chase the offers for the items you need that week, and they often send money off vouchers if you miss a few weeks shopping with them.