Hi, it was suggested that I copy some pics onto the main forum so hopefully it will work out ok. Hope you like them.
I have added some notes as well.

Some Liverpool postmarks, one with the N (for North Liverpool) reversed, with a '4' on its side, and unusually a '466' in a box inside the bars.

Watermark variation where the wire original that created the crown shape has dropped off and a simplified replacement made and fitted.

Newspaper Branch postmarks following the Stitt Dibden List, these are also in the Curt Fernau booklet.

A few more of the NPB postmarks, some not listed as far as I know, but still loooking!
Hope you find them of interest. I am currently trying to build up a collection of the usual country wide Duplex postmarks, and also the London types.
Best wishes to all.