The best example of how the UK planning system has become bogged down in detail rather than focussing on delivery.
A national definition of eaves or rather a national rule which didn’t define how to measure eaves and so led to much confusion, and worse national guidance not forming part of the regulations, with diagrams not part of the regulations, with a perverse and unjustifiable definition.
In almost every other country
a) such rules would be left to municipalities to code:
b) Such codes would be replete with diagram and strict legal definitions
c) the last topic planners would discuss in a pub would be eaves.