Try ASDA, Tesco or Primark. You can buy two or three (and perhaps four) pairs of jeans for £40. They come in a range of sizes too.Got some in Burton.
What's annoying me now is people walking through shops with their eyes glued to their phones not looking where they are going and clash into you and make its your fault even when you've had to stop in the hope they look up for a second and see you coming.