Isle of Man Pottery, Rushton Ceramics and The Mill Pottery

Anyone have any info on Isle of Man Pottery,  Rushton Ceramics (also signed Rushton Pottery) and The Mill Pottery?
The Studio Pottery website just has 'Isle of Man Potteries Ltd started in 1963'.
I think pots signed 'Hand made Isle of Man Pottery' are early Rushton Pottery which then changed its name to Rushton Ceramics and then produced the Celtic range.
But there was a reference to Iden-Kirklands: Manufacturer of earthenware at The Quay, Ramsey, Isle of Man, but the webpage is down and wasn't archived  
When searching for the Mill Pottery there's an old address: The Mill Pottery Limited (company number 017781C), c/o Rushton Ceramics, Jurby Industrial Estate, Jurby, Isle of Man, so that also has a link to Rushton.
And who was Rushton?

Rushton ceramics of Industrial Estate, Jurby, was  a limited company from 1978 to 2009. For part of this time, form 1979 to 1999, Rushton Stoneware of 16 West Quay, Ramsey was also registered.
"The Mill Pottery" was a limited company from 1981 until 1987.
https://services.gov.im/ded/services/companiesregistry/viewcompany.iom?Id=wJ7Z7KAYXngHRID%2fzR1dEg%3d%3d
https://services.gov.im/ded/services/companiesregistry/viewcompany.iom?Id=wJ7Z7KAYXngHRID%2fzR1dEg%3d%3d
https://services.gov.im/ded/services/companiesregistry/viewcompany.iom?Id=OOeHIBS5mGITTjrxL%2bomLg%3d%3d
None of which makes anything much clearer.

Cheers