Blacksheep....
Probably the best people to answer your query would be H.M. flying club as they still operate the '10.
I do know that the L1011 had a similar system but the aileron deflection was when the flaps were up! they were also active for bending relief. It was only fitted to the -500 model as it had a greater wingspan (approx 18ft overall??) and meant that the structure didn't need strengthening.