The idea
For some bizarre reason it is really difficult to study the British Standards legislation unless you buy each 1 at an exorbitant amount of £160 or so. Libraries will let you view them on computer (with a password or some such twaddle) but you can only print off something like 15%.
If tradesmen are expected to follow these standards then for goodness sake make them accessible!
Why is it important?
Cutting through red-tape for ease of compliance with the law. Either that or subsidise businesses who need to use them.