"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
The park is big - 900 acres - and the trams run in it in the summer. Do a bit of googling.
I knew about the trams, but only learned about the Tank Tram recently. I would imagine they'd run it on anniversaries connected with the Great War.
(Incidentally, the single-deck tram in the picture has "Manchester Square" on its destination board. That's nothing to do with Manchester - Manchester Square is in Blackpool, about 50 miles away. Blackpool has probably the most famous tram network in the UK. Confused?)
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"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.