No other information online that I can locate.
Less than a minute of Googling.
No, it is a completely new and very large workshop & storage building. The only 'extension' is a continuation of 3 roads in the original depot to access the new building.Looks like the roads in the new building might be accessed via a traverser. That's going to cost a pretty penny in and of itself...
The drawings and plans are preliminary so can change particularly in exterior design, the layout of tracks and main building might not change much though.
The news item suggested by subject this was an extension of the actual network and I was hoping to see it extended to the south perhaps or the east?The tweet said it was a workshop expansion. The word extension was not used.
What is the purpose of the proposed siding at the entrance to the depot? Is it to serve a planned café or function centre?The tramway depot Is the starting and ending place of the tourist talking tram tours, I'm guessing the siding would be used to stable a tram (between tours) without blocking tram and road vehicle access between the depot and the system.