There is actually a bit of a sea-change hidden within this announcement, I think. Of late, the mantra has been very much that whatever happens at Gatwick must not be allowed to impact on Heathrow - the only really duplicate routes have been domestics (predominantly for long-haul leisure feed) and Amsterdam (much the same). Adding Berlin and Madrid at Gatwick together with also continuing to serve some of the routes at Heathrow looks to be a relaxation of that policy if indeed it hasn't been taken out completely.