When Airfix did the Valiant, they released a IP conversion kit (with decals) a while later that allowed the
PR and tanker versions to be built. I suspect Airfix will do the same of this one. Current rate for the Matchbox Victor which has just been re-released by Revell is around £18.50 (it is a pig of a kit to build, so I suspect the Airfix one is actually better value for money).