Nothing on Gatwick's website about northern runway ambitions since summer last year. When can we expect the next bit of news?
Never rely on company websites for updates especially regular updates. In my opinion they are the worst places to visit for such things.
The London Gatwick Airport official website has a tendency to always be behind other sources of information. In some cases especially regarding airport development it's not listing anything at all.
I've been asking on LinkedIn for ages when the Pier 6 extension will eventually start construction with still no direct answer. In my opinion Social media sites such as LinkedIn are your best bet to keep upto date with the planned developments rather than the official website.
A simple Google search will be of great help as you tend to come across so much information that you would otherwise be non aware of.