Sir Mark Sedwill, Cabinet Secretary and Head of the Civil Service, said:
“I have received and accepted with great regret the resignation of Sir Philip Rutnam.
“I thank him for his long and dedicated career of public service. Shona Dunn, the Second Permanent Secretary at the Home Office responsible for borders, immigration and citizenship, will become Acting Permanent Secretary with immediate effect.
“The Home Office’s vital work to keep our citizens safe and our country secure continues uninterrupted.”