Carter's Steam Fair is real, based in Maidenhead and touring regularly in the area where Midsomer Murders is filmed. Most of the rides are still powered traditionally by steam engines, not diesel generators.
Episode is mostly filmed on the Holyport village green in Berkshire where the Carter Steam Fair is situated. The pub scenes are in The George overlooking the green.
Like Jones and Scott before him, Nelson isn't given a send off like original sidekick Troy. It is also the last appearance of Sykes who appears heavily in the final scene.
Michael Higgs (Butch Nevins) and Tamzin Malleson (Kate Wilding) played husband and wife (Patrick and Christine Redfern) in Poirot episode Evil Under The Sun.
David Yelland plays Jasper Wyham in this episode. He previously played the role of James Kirkwood in episode 10.5, Death and Dust (2007).