Originally Posted by corporate-wage-slave

You can move it by one year from the date of you initially booked the ticket (not one year from first date of travel). If the first flight on your booking is cancelled you can just leave it in limbo, provided it is not a BAH booking or on a non BA carrier. You can then rebook to any time within that year. If your first sector operates but other sectors are cancelled then you need to call up to prevent being a no-show, but you can still ask them to remove that first booking, so your flight is in limbo or has some random date in it to hold the data in the system. Good luck with the nuptials, hopefully it will sort itself out.