Both Lovatt of Langley Mill (click for images) and James Pearson of Brampton (Chesterfield) (click for images) made jugs that would be almost indistinguishable from Denby if they hadn't been signed. I have also seen unsigned jugs with sprigs seemingly identical to Denby but showing a stag hunt rather than the fox hunt that is the Denby standard. Whereas Denby and most of the other look-alikes have a flat base these have a 4mm raised rim. They can pretty confidently, also be attributed to Lovatt, as I have now seen a 2 Qt (4 pint) example impressed "Langley Ware.