51 Degrees North can be watched online on June 30 for free and anyone organising an event can screen it for free.
SEE: http://blog.asteroidday.org/2016/06/02/screen-the-film-51-degrees-north-at-your-event-and-watch-for-free-on-june-30/
The trailer, which is pretty new, can be downloaded via Vimeo.