At last-an answer as to why we declare LVPs. I too wasn't aware of the ability to depart with a lower minima.
Obviously we don't declare LVPs are in force until all safeguarding has been completed AND as you say, the standby generators are up and running.
When next I hear you dashing off in 125 metres (cos I can't see you in that sort of vis) at least I'll know who you are now-and more importantly WHY you can depart.
Many thanks guys-you've made an old man very happy