Todays update from management appears to paint an even worse picture than before. B777 is currently carrying surplus pilots, however this will be rectified when the delayed orders are delivered. B747 will be in surplus when at least two more jets are grounded in the winter. B757/767 will be in surplus at the same time for the same reason. A320/B737 at LGW will be in surplus at the same time for the same reason. A320 should be about right as things stand at the moment, HOWEVER, this may change if the company are allowed to simply suspend LHR routes under the 80/20 alleviation.
BA don't have any other fleets.
As stated earlier, the Voluntary Redundancy program is purely a mechanism to allow the pilots to strip costs out of the system by improved productivity. It was never designed to cope with a pilot surplus. Other measures will have to be found to address the probable reduction in flying volume.