Thanks for that villas.
If in the example of having already selected flap 1 for approach and then lose both G+B then as discussed earlier in thread VREF+10 is displayed on the STS. Looking in the expanded FCOM proc for G+B below it only mentions Vref +25. The expanded notes says 'speed must be increased due to loss of spoilers AND ailerons'.
My concern with using the VREF+10 is yes in terms of spoilers you should be fine with this lower speed compared to G+B in clean config however with VREF+10 is this enough to take into account the loss of ailerons? What I wouldn't want to happen is get to the flare and find hardly any roll authority since only splr 2+4 available for roll coupled with the lower VREF+10.