Maybe the same as the way our club is run, it's good to gain information from other sources.
Even as National Observers we have done Bikesafe courses as a student, can pick up some useful tips and training methods.
Sometimes knowledge is diluted as it is passed from Observer to new Observer and myths and bad habits start to creep in, re- evaluation of Observers does help to keep the standard high, but "mystery shopper" training is a cheap way to up your game.