I posted this in the other S&B topic by accident (why are there 2 anyway??) but realised this one has much more traffic.
I have reasonably good legs but a fat arse/big tum so I look much better in skirts than I do in trousers. I have one denim mini skirt which looks fab but I can't wear that all winter so am after at least one more skirt. Am thinking a flippy-type one but I can't find any 
I am 5ft 8 so it needs to be at least 20 inches otherwise it looks indecent 
Budget is no more than £30. Any suggestions?