These is an exLSWR P+P set that was made from Blacksmith Models kits. The coaches represent the 31-36 sets that were used around Hampshire and Dorset in the late 50's.
I considered the lack of suitable stock for Hornby's sublime M7 and suspect that Hornby might produce a BR-built Maunsell P+P set, so to avoid duplication chose these on the notion that panelled stock would be Hornby's last choice.
The hard work is complete and they merely require underframe, body and roof details before painting in Carmine Red. There is wonderful photo of set 36 standing at Wimborne on page 233 of Castleman's Corkscrew - Oakwood Press.