A few quick pics of some older-style British light switches.

First is a typical 1940s-style tumbler switch, with porcelain (vitreous) back and brown bakelite cover. This is the Britmac "Little Briton":
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The lower two round holes are the terminals, the center pair have a wax insert covering the screw heads which hold the switch mechanism in place:
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These have a quick-make/quick-break spring-loaded toggle making them suitable for AC and DC use. Contact ratings are the standard 250V 5A maximum:
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