That doesn't say that he was in the SAS. It just has his name and SAS in the same paragraph.
It says that in the past MI6 needed a person with military skills do something, as was the case with Crabb, so they decided to start cross-training SAS people to do that in the future.
Neither the Wikipedia article nor this endnote says that Crabb was SAS.
It says that in the past MI6 needed a person with military skills do something, as was the case with Crabb, so they decided to start cross-training SAS people to do that in the future.
Neither the Wikipedia article nor this endnote says that Crabb was SAS.