Need more practice then, the occasions when I did remember to bend my knees I did find it helped.
I think part of the problem is the venue, its quite small (not a sports hall, more a large function room) and its very popular, they are at capacity (150) most weeks. I am fine when in space but as soon as I catch up with traffic I stand up and coast. Thats when all but one of my falls have happened. Far too many people three abreast holding hands rolling along at less than walking pace!
Cant wait for next year when weather permits skating outside so I can find somewhere to skate at my own pace.
I also need to stop trying to keep up with my wife, both of us havent skated in over 10 years but she has just clicked and picked it up straight away