Kate and William in SAS Training. Prince William and Kate had visited the SAS headquarters for training on terror and the threat of kidnapping. SAS headquarters are in Herefordshire HQ. At that time, Kate and William get training about safety. Kate and William do this visit for the first time. SAS is an elite troop who very helpful at all to protect safety of the royal family. Kate and William visited the SAS with zeal and enthusiasm. This visit will give a good impact for members of the SAS.