rb & hand stamps mystery marks more examples - any progress with ID?

Pictures or a couple of examples I have of pieces with this mystery mark.

Both purchased in Lincolnshire, probably a year apart, from locations 10 miles apart.

Not suggesting they originate from Lincolnshire, much of the studio pottery that surfaces in this area originates from accross the East Midlands, particularly Derbyshire, & Nottinghamshire, as well as South Yorkshire & the East Riding. Not to mention the many items from Cornwall & Devon that surface everywhere.

The first letter of the handstamp impression seems to have an accent before the letter?

Just thought it might be helpful to see more examples and to ask the question has anyone made any progress in identifying the potter?

Still a mystery

https://www.20thcenturyforum.com/t26693-rb-mark-and-hand?highlight=Hand