I often see these kind of things, It's had round plastic or round leather pads stuck to it's feet at some point. The cart or carriage is missing. I haven't been able to ID them but always thought they were Cooper Craft or Melba ware. I never thought about Trentham Pottery actually, i'll have to look into that...
I've never seen one with a 'Made in England' stamp as far as i can remember...