'This is the biggest animal disease outbreak we've ever had on the planet...and we have no way to stop it from spreading'
The controversial program has been called 'the most expensive wildlife destruction policy in British history'
The cull is an attempt to wipe out a common disease-causing bacteria
The animals appeared on television earlier this month
The film sets out to expose the truth behind 'the largest land-based slaughter' of wild animals
Campaigners don't think culling is ever humane
Now more than 75,000 people have signed a petition calling on the parks to stop the cull
A mass grey squirrel culling is in motion in a bid to save red squirrels