Chris: I don't actually own any straps. It's more the bar is rolling into her hands loading her wrists and arms as opposed to slipping out of her grip. I feel if her back didn't round and she improved her flexibility a little it would sit nicely on her shoulders as I would like. We're only talking really light weights, but it's just too uncomfortable for her currently to get any benefit out of it.
Samuel: Fair play, I couldn't see anywhere to do the horizontal version and it looks a bit stressful with the legs straight potentially, but what do I know! Doing in on a 45 degree BE with a plate is doable. I'll have a play around with it before getting the missus to give it a try. Thanks for the idea!