Now, 'jumper', that's an interesting word. For some reason, it was never used in my East Midland home when I was a boy, and it doesn't come naturally to my lips now. We said 'pullover' (male) or 'jersey' (unisex). 'Sweater' was rather frowned on, I think, as being slightly vulgar - and one thing we weren't allowed to be was vulgar!