David,
I do understand and agree. you can't hold the boat AND wind the paddles, so if there's no way to hold the boat back, what do you do?
I've normally either collared a passer by, or let some water in and then walk back to hold the boat. This takes considerably longer but, in my opinion safer. I'm in no rush whilst on the cut.
I remember somebody who works for BW is a member on these forums, maybe we could get some info from Eugene? (I think that's his name).
Edit > Maybe start an alternative post with a list of locks with either dodgy handrails or lack of bollards etc?