Michael.
I found this information on Tradition of Londons website:-
C.B.G. Toy soldiers, 54mm mignot standard size.
CBG MIGNOT has been on the market since 1825 without any interruption whatever the European, World or civilian wars, the revolutions, Occupations and other events of smaller importance the Company went through. The little Mignots are still made using the old techniques, slightly updated, from the original moulds, the oldest ones of which still used tracing back to 1825, and most of them to the Twenties quite often, only the state of freshness and the style of painting gloss or semi-gloss will differentiate to-day figures from figures made a halfcentury or more ago.
Having never seen any up close I can't say whether they match Dorset and Wessex.
Hope this is some help.
Regards
Jeff