Updating the FMS
In the very early hours of 16th March the London West sectors are changing quite considerably, with new routes and lots of new points introduced. I know that the points can be input to the FMS during an update anytime the Lat/Long has been decided, and that the flight plan will give the correct routing for the pilots to select the routing points, but my question is about the stored routes. I understand that the FMS can store the routes regularly flown by an airline and this will save time inputting every fix, but how soon after the change can say a fleet of 30 a/c have all the new routes updated? Is it just updated every time a new route is input by the first pilots using a particular a/c on the route, or can a bulk update be downloaded? How long would the new airspace details take to update? Finally, if say flying from Manchester to Tenerife via the new airspace, how long will it take to manually input all the fix's if the FMS only has the old route stored?
Thanks from a curious ATCO!