This collection of parkrun venues have all been used as filming locations for movies. I've also listed venues where the filming is very local and worth noting.
It's a work in progress, so this list will grow as I research the venues (yes, it's a big job)
Forest of Dean - Star Wars: The force Awakens - Forest scenes filmed in Puzzlewood, which is part of the forest.
Fulham Palace - The Omen
Gunnersbury Park - Bend it like Beckham, The World's End
Hampstead Heath - Notting Hill, Scenes of a sexual nature.
Keswick - Star Wars: The Force Awakens - Derwent Water used as approach to Maz Kanata's castle.
Newbury (Greenham Common) - Star Wars: The Force Awakens - The Resistance base
Richmond Park - Billy Elliot, Sherlock Holmes: A Game of Shadows, Into the Woods, Get Santa.
Southwark Park - Stan Lee's Lucky Man (TV).
Tooting Common - Snatch (scene filmed in the Lido)
Tring - Avengers: Age of Ultron - Tring School interior used (the school and the park were originally The Tring Park Estate)