United Nations aid chief Martin Griffiths, who recently pushed for more humanitarian access to Gaza, plans to step down at the end of June for health reasons, a UN spokesperson said on Monday. Griffiths is a British diplomat who has headed the Office for the Coordination of Humanitarian Affairs (OCHA) since 2021. Farhan Haq, deputy spokesperson for UN Secretary-General António Guterres, did not disclose the nature of Griffiths’ health concerns. “He advocated tirelessly for life-saving aid to reach those most in need and for the resources needed to do so,” Haq said in a statement. “A skilled di…