BAFTA and Emmy-winning film-maker and journalist John Pilger takes on the National Health Service in his latest, heartfelt investigation.

"This film is a tribute to a unique institution," says Pilger at the start of The Dirty War on the NHS, which is about threatened democracy.

Above all, it is a warning. Pilger investigates the dismantling "by stealth" of the National Health Service, "a last bastion of true public service".

This screening will be followed by a director Q&A.