It’s not hard to be safe, even on a training ride. Those at the front need to be mindful of the effects of their actions on those behind. So, for example, when approaching roundabouts or junctions the object should not be to sneak through, but to ensure that the bunch can get through. This may mean stopping. The whole point of this bunch was that it was to be a bit more controlled and accessible than the Renfrew Bunch. Even though there are now points to be won, it is not a race and should not be ridden as though it is.
Cheers