New research reveals how measures introduced to combat terrorism have had a significant impact on humanitarian organisations, eroding their ability to protect civilians and provide humanitarian assistance to those in need.  The report considers how counter-terrorism provisions can criminalise humanitarian action and undermine principles of neutrality and impartiality. Whilst the tenth anniversary of the ‘war on terror’ has given rise to myriad reflections on the past decade of conflict, little attention has yet been paid to the impact that these measures have had on humanitarian action across the globe.