I had thought that the guys filming at the last game of the season might be a Hemel local news crew, but I've just read this article which sets me right:
[urlhttp://www.londonrl.com/article/12358/rugby-league-hits-the-indian[/url
(slightly unfortunate abbreviation that the website used for its URL....)
They were in fact getting action shots for an Indian cinema film, with the close-ups scenes filmed with the actors at Pennine Way. This means that the Pennine Way scenes needed to use the Oxford shirts, so presumably the club were involved at some stage.
I wait eagerly for my Equity fee as one of the extras.