Firstly, congratulations on a great site. A truly valuable resource with some interesting ideas! I have recently been given, a very small wood-burning stove, and I'd like to install it in my shed but can get no advice save building regs that are somewhat over the top! after all, it's only a shed!
I'm planning to mount the stove on a slab, place a sheet of fireboard on the wall behind it, and change the section of roof the chimney goes through with fire retardant plywood and I'm allowing a 250mm clearance around the chimney through the roof, with around 0.5m of chimney above the roof for draught.
Would you recommend anything else?