I've never had to climb a pole wearing Gaffs, as all our HV poles wear climbing studs, just lean a pole ladder up against the pole and extend it and you find access to the pole, you have to be wearing your pole belt and safety strap, otherwise you can't work, just gripping to the pole!.
Besides most of our poles are made of Concrete, for HV applications.
Bill,
Thanks for the link, mate, I'd forgotten about that one!