“It has been an honour and a privilege to lead the British Red Cross.”
Chairman David Bernstein said: "Under Sir Nick’s guardianship we have become a leading force in the humanitarian sector, reaching millions of people each year in the UK and operating in over 25 countries overseas.
“He has also contributed hugely to the success of the global Red Cross and Red Crescent Movement.
“Nick's tireless work for the organisation has been an inspiration to us all and we are enormously thankful to him. He is extremely well liked by staff and volunteers here at the Red Cross, and will be very sadly missed."
Sir Nick joined the British Red Cross in 1990 and was director of UK operations until 1995. He was CEO at MacMillan Cancer Relief between 1995 and 2001, and was knighted in 2000 for services to cancer care. He was appointed as chief executive of the Red Cross in July 2001.
He has carried out various missions overseas for the International Federation of the Red Cross and Red Crescent Societies and on behalf of the UN. He also accompanied our President, HRH The Prince of Wales on his visits overseas to see the work of the Red Cross after major disasters.
In 2011, Sir Nick was the awarded the Outstanding Leadership Award by Civil Society Media at The Charity Awards and the Queen’s Badge of Honour in 2012.
Sir Nick will be working part time until he leaves at the end of August. Mike Adamson, managing director of operations at the Red Cross, will act with the authority of chief executive until a permanent successor is found.