The Princes End branch was used for Sunday diversions during the electrification work at Wolverhampton. One particular train was the 10.25am DMU 2H67 from Birmingham to Stoke-on-Trent and Manchester which ran via Tipton, Wednesbury, Walsall and Rugeley. Jan Ford describes a journey on it here http://janfordsworld.blogspot.co.uk/2007/06/sunday-stroll-to-stafford.html.
Then of course, as I mentioned some time ago, there was Spam 79 on a CrankEx in 1964.