I'm reading a novel set in present-day England, and it's sprinkled with uses of the construction in the title. This is far from the first time I've encountered this in BrE writing, along with general references to a "tooth comb" (I believe A. Conan Doyle used that).
I've never seen this in AmE, always fine-tooth (or fine-toothed) comb. Is there any justification for this in BrE? Is it a regionalism?
Searching for examples of the phrase has proven futile because search engines seem to normalize it -- all I get are the AmE version.