The 2010 film "Four Lions", which is set in Sheffield, has a scene on board a Supertram with an on-board TV in operation. I don't recall the Sheffield trams ever having on-board TVs. I am guessing that this was done especially for that film.
See also the thread on TVs on buses at
www.railforums.co.uk/threads/televisions-on-buses.198094/
See also the thread on TVs on buses at
www.railforums.co.uk/threads/televisions-on-buses.198094/