My goodness, there are some depressing replies on here 
So many mumsnetters who are bad at cooking or completely lacking in imagination.
Yes, lumpy mash and flabby sausages are very unappetising @Greengreentea, but top quality butchers sausages with creamy mash made with hot milk, butter and plenty of seasoning is another matter entirely. Served with an onion gravy and fresh vegetables this would make a lovely winter meal.
I think posters are thinking about traditional, old fashioned meals where people didn't have much money, but modern British cuisine is as good as any anywhere in the world. I had the pleasure of eating at the Black Swan in Oldstead last year. All the fresh produce was from the garden, and the meat was locally bred. It was rated the best restaurant in the world by Trip Advisor in 2017.
I agree that the more simple a meal is the higher quality the ingredients have to be. We live rurally, and all the pubs round here that do food source their meat locally.
I like all cuisines. I don't think there are any I dislike, and we do tend to eat all around the world in our house. We also enjoy well made traditional British food made with vegetables from the local farm shop (some of which they grow themselves), and meat from the butcher who sources all of his meat locally.
Oh, and our local pub does a cracking fish and chips made with freshly caught fish brought over from Grimsby and cooked in the lightest, crispiest beer batter. I have never tasted any as good at the seaside.
I will say that the one thing the Brits probably do better than anywhere else is baking.