The Bolton steam museum is going to be in steam. While we have a fair
number of pics of the engines we don't have videos of them working.
Other dates are 26-27 may, 25-26 Aug 26-27 oct or 28-29 oct
10am-4pm and admission is free.
In particular https://en.wikipedia.org/wiki/Musgrave_non-dead-centre_engine
has its own article.