I took the hovercraft from here to Calais back in 1994 when we went on a two week circuit of France. Unfortunately apart from the pad the hoverport has largely disapppeared.
The hoverport was originally opened on 5 July 1978 and had a berth to accommodate Seacat ferries next to the pad. Its location at Dover's Western Docks was originally decided in terms of its proximity to a planned rail route from Dover to Canterbury, providing quick change from train to hovercraft. However this idea was phased out due to financial difficulties.
Strong ferry competition and the opening of the Channel Tunnel forced the company to close, the last service being on 7 November 2005.
Following a cross channel ferry operation from the site the hoverport was demolished in 2009.
It did look as if there was some construction activity on the site but this might just be a local contractor renting the space for storage.
I imagine it will end up as a carpark for the main ferry terminals.