While fighting fire with the Forest Service, we subsisted on MRE's. Some are good; others are not so good. I'll eat just about anything, especially after a week on an incident and they were all just fine with me. The best, in my opinion, is the Chili Mac and Meatloaf with gravy. The ones I would place at the bottom of the list are the Captain's Chicken and Shrimp Jambalaya. The Veggies are alright too. As far as components go, the pound cakes are top-notch as are the fruits. Of course this is all in relative terms. After awhile, you start to mix things up and come up with your own concoctions. Such as pineapple pound cake with a thick cocoa paste smeared on it. The jalapeno cheese spread was always a hot item and very valuable on the line. I have gotten everything from money to smokeless tobacco for my packages!
I have never had a British meal to compare it too, but I would assume they are all designed with the same premise-to provide troops with alot of calories, some variety, and decent palatability to boot.
As a side note, the MRE heaters are fun to play with. Break of a sizable chunk, stuff it down into a plastic water or soda bottle, add a little water, throw it, and wait for a loud report. I myself have had my fill of them and would only eat one as a last resort. But don't let that scare you! Have fun and God Bless! Jerry