hey! you might want to try sweet potatos! they're a great replacement for regular potatos! And i actually think they're more flavorful!
I think you need to grow up with sweet potato's, personally I just cant eat them. I doubt they're easily found in the West Midlands anyway.
If you've a larger spud, just eat half with grilled chicken and peas or beans. People really tend to over-react when it comed to a potato. Even a big one is OK so long as you don't cover it in butter and cheese. You can easily double the calorie count of a jacket potato by doing that.