Oxfam’s deputy chief Penny Lawrence has resigned following the charity’s failure to respond to allegations of sexual misconduct by aid staff.

Staff working in Haiti and Chad after the 2010 earthquake had reportedly paid for sex with sex workers, and an Oxfam internal investigation in 2011 confirmed sexual misconduct had occured.

UK Aid Minister Penny Mordaunt has threatened to withdraw government funding from Oxfam unless the full details were revealed.