Re large timber shed or office or garage near boundary (1m rule) ...
Had an interesting conversation with an unusually sensible (rather than the ir more usual hysterical crowd) senior manager at Zurich.
It is quite acceptable to paint such buildings in fire retardant coatings ( paint for want of a better word), in terms of compliance with BR. This migh t be more attractive than the usual cement board cladding (another common s olution), although I can see maintenance potentially being more tedious (& costly).
I do not ever remember anyone suggesting it, so might be of use to someone. Existing coatings of course may preclude its use, manufacturers instructio ns apply.
Aside: UK.D-I-Y Wiring Reg FAQ on min bending radius for FTE needs to have a comment about checking cable manufacturers instructions (MI), because qui te a few say 4x minor axis on min bending radius (Prysmian for one). There are other standards too, BS7540-1 Section 5.6.3 Table 2 states, Cables diam eter 8 12mm bend radii 6D. Definition of D = the overal diamet er of round cable or the smaller dimension of flat cables. So by BS7540-1 t he min bending radius becomes 21.6mm which is not a mile away from the Prys mian 4D figure.