Come off it. Food in the UK is for nothing. Go to Europe and have a look round for comparison.
I can go to any supermarket and buy a £4-5 chicken, big bags of veg for 50p and £1 a bag, it's dirt cheap. Jamie is on the TV every week showing us how to knock up a dinner for £1 a head. Yet another chicken and veg pie served with potatoes, yet another shepherd's pie, carrots at 60p a kg, celery 60p a head, cabbage and swede the same. Milk £1.60 for 4 pints. That's cheaper than branded water. Bored with chicken? Get some pork. Standard chops are not much more expensive than chicken, and it's all wholesome nutritious food dished up with a pile of veg. Make custard or milk puddings with the milk at 40p a pint and knock up a fruit crumble for 50p a serving. You've worked as a chef, you know this stuff takes minutes, and it costs next to nothing. Remember min wage now is better than £10 ph, and you can still knock up a decent meal for £1 every night of the week. That's 6 minutes labour, before tax. It could barely be cheaper if it were free.