We first visited the museum about 3 years ago and were surprised to find that we could upgrade to a 1 year ticket at no extra cost, just by signing a gift aid form. There are usually a total of 3 trams or trolley bus available on each visit for public use, plus a small train. In addition there are several museum building with static displays and a cafe which is good value too. Worth a 3-4 hour visit, but does get very busy on special event days.
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