Unveiling a portrait of Dr Chad Varah, the charity's founder, the Prince of Wales said: "I am deeply appreciative and full of admiration of everything these remarkable volunteers do; that you give up so much of your time and provide your love and compassion in this way."
More top news
A drunk man who narrowly escaped death when he lay down between train tracks in Harlow has been given a 12-month community order.
A man from north London has been charged with the manslaughter of Louella Eve Fletcher-Michie, who died at the Bestival music festival.
The mother of Ellie Butler - the six-year-old murdered by her father - has lost a bid to challenge her conviction.