Given your answer & my further investigating it looks like I won't be able to fit these, shame as they look nice.
The rear guard would fit behind the seat tube I'm sure as there's at least 10mm of space.
However, it's the front which has barely 2mm gap between tyre & underside of brake.
When my tyres wear out perhaps I'll get a thinner set, allthough that won't be probable until after xmas as only just fitted them.
I'll probably hunt out a second hand hack bike for the winter, less trouble & makes you feel good come spring riding back on your summer bike.
Cheers anyway...