The training took place at the SAS headquarters in Herefordshire.
The Royal newlyweds, both 29, visited the elite Army regiment’s headquarters for safety briefings and also to meet injured soldiers and widows of those killed in action in the conflict in Afghanistan.
The SAS, with its motto of “Who Dares Wins”, has close links to the British Royal family. SAS experts also briefed William’s parents, Charles and Diana, after their own wedding in 1981.
A source said of the SAS that their “advice and help is vital to the safety of the Royal Family.”
William and Kate are expected to return to the barracks soon to participate in an emotional and frightening mock rescue mission from a building known as The Killing House.
SAS teams armed with loaded guns and stun grenades will storm the two-story building, which has four furnished rooms on each floor, and extract them. The elite soldiers practice in the house daily using live rounds as senior officers monitor the action on CCTV.
The royal newlyweds will also take advanced driver training courses designed to help them if they are attacked and a kidnap is attempted on the road. The idea behind much of the training is to show William and Kate how to behave in a kidnap situation and how to facilitate an SAS rescue mission, rather than hinder it.
The couple’s visit to the base in Credenhill on Saturday coincided with celebrations to mark the regiment’s 70th anniversary. Insiders said the visit of the popular young royals was “great for morale.”
While there, they unveiled a memorial garden in honor of fallen SAS men and met widows and wounded soldiers.
The source added: “Their visit was great for morale.”