Aaaah, that's better than a mortar or two...
I have no idea how effective this hybrid was, but the French 75 was, I think, the basic design that the Americans used for their tank 75s, so perhaps it was a reasonable bit of kit. Anyway, that's all the LwFD fellows have got.
In keeping with the make do and mend theme, I decided to finish the 'Bathtub' as a later war second line vehicle that my LwFD have liberated from the police and pressed into service, perhaps as an artillery spotter's vehicle:
A very nice little kit, but small and fragile, hence the base.