CAA speculates obscure rules and regulations / practices and proceedures
To be honest they are not that bad. It just takes a little time for your experence level to build up enough to realise why they say you have to do it a certain way. Some you take with a pinch of salt (mobile phones on in a light aircraft) and others you break at your peril (fly at under 200ft above liverpool city center)
They really don't make them up for the fun of it. Most are brought in post accidents to stop it occuring again in the future. Time passes we forget why the regulation was changed. Then start bitching that its a stupid reg.
MJ
Atcham Tower A very perceptive post