There are some minor, and a few not-so-minor, differences but I'm not sure what you mean by "The lower handguard has a gap near the butt socket". Maybe you mean a difference in the back face of the forend, where a typical early british pattern forend has an inletted "key" in which the square tip of the buttstock bolt protrudes, as opposed to the later, Indian pattern forend which did away with that stuff. Feel free to reach out to me and send me pictures!