Sir Christopher’s demise was confirmed by present Ambassador Karen Pierce on Twitter following a report within the Every day Mail.
He served within the publish for six years from 1997, and had beforehand been press secretary to Conservative prime minister John Main between 1994 and 1996.
Ms Pierce wrote that he was “an excellent diplomat and an excellent character”.
“All our ideas are with Catherine and his household,” she added.
Sir Christopher launched his memoirs, DC Confidential, in 2005 recounting his time as Ambassador.
It included sharp criticism of former prime minister Tony Blair for his dealing with of the interval main as much as the Iraq Conflict.
The Every day Mail reported Sir Christopher suffered a stroke whereas on vacation together with his spouse within the French Alps.