Why are you not in a "safe" envelope? You are above VLS and below VLS + 25?. Take-off Flap 1+F has a normal climb speed (V2 +10) well below S Speed.How is this situation different?
I think the key would be to ensure TOGA is selected before the flap lever is moved (if thats what you choose to do). As TOGA with GS and LOC still engaged would become interesting very quickly!