From the 777 tech manager
Just had a word with the BA 777 fleet tech manager (Core) ((whatever that means!!) who agrees with me that there is no flap movement on approach with land flap set - even if speed is low. He points out that there is a autoslat feature that will deploy the leading edge slats from "sealed" to "gapped" if low speed protection is triggered (alpha floor in airbus speak) but as the slats are fully deployed at flap settings beyond F20 this is not what is being discussed here. Similarly the flap load relief operates at a high speed and would be very exciting during final approach where speed should be stable by 500' AAL.
Hope this is the definitive answer we need.........