There isn't a British name for those - we don't eat them.
My Fellow Americans:
I read this, and though, "Surely that can't be completely right - after all, they
do have Southern cuisine restaurants in London." So I poked around a bit, and got hold of a menu for a chain of takeaways in London called, simply enough, "Southern Fried Chicken". Plenty of "chicken burgers" on hamburger buns, but no southern biscuits!
So then I thought, well, KFC is in the U.K. - the Colonel won't let me down. But
see for yourself - not a biscuit to be had!
This is an outrage. I'm going to be emailing their corporate offices. You can't serve a proper southern meal without biscuits!