Is it possible that the jug was produced by Burlington Bertie from Bow who was inspired by Devonmoor Pottery and created identical or almost identical pieces.

This is an Unusual Old Uncle Tom Cobley Character Jug in Turquoise Blue/Green Colour. 6.5 inches (16cm) high and in excellent condition. 1940/60's - a real talking piece, great for any table, serving ale/water/juice etc

Stands approx. 6.5 inches tall

There is not much information about Devonmoor Pottery itself. It was established in Newton Abbot, Devon in 1913, but ran for only about a year. Perhaps the proprietors were called for service in the first World War. The company re-opened in 1922 by Herford Hope.
The pottery remained in operation for about six decades.
The phrase Uncle Tom Cobley and all is used in British English as a humorous or whimsical way of saying et al., often to express exasperation at the large number of people in a list. The phrase comes from a Devon folk song "Widecombe Fair", collected by Sabine Baring-Gould. Its chorus ends with a long list of people: "Bill Brewer, Jan Stewer, Peter Gurney, Peter Davy, Dan'l Whiddon, Harry Hawke, Old Uncle Tom Cobley and all." The surname is spelt as "Cobleigh" in some references. Whether Tom Cobley, or the other characters from the song, ever existed is uncertain. Local historians have attempted to trace them in and around Dartmoor (for if they did ride to the fair at Widecombe, they may have travelled some distance).
There is some suggestion that his relatives have been traced to a family which had moved to Plymouth in the early 1900s, but that no longer hold the name Cobley.
The strongest claim is held by the village of Spreyton, to the north of the moor, whose churchyard does indeed contain the grave of a Tom Cobley, buried 11 January 1844. However this is said to be the grave of the nephew of the "real" Tom Cobley, who died in 1794 and whose grave is unmarked. Cobley disapproved of his nephew and kept him out of his will (signed at Pascoe house, Colebrooke). The house at Butsford Barton, Colebrooke, was supposed to have been the home of Uncle Tom Cobley.
Old ‘Uncle Tom’ was said to have been an amorous bachelor and when he was young had bright red hair. This characteristic seems to have been to his advantage, for when paternity orders came in thick and fast, he refused to maintain any babies that did not have red hair like himself.