I've never seen this one before, but it's not Jobling, Bagley or Sowerby; the colour is wrong for all three for a start. I would bet (not much because I'm tight and don't gamble, well not more than £2 at a time) that it isn't actually made in Britain, rather made for Britain in Czechoslovakia (pressed glass like this is unlikely to be Bohemian, as such because Czechoslovakia came being in 1918ish) or elsewhere, and that someone was naughty.