2 undercover SAS detained in Basra were caught by Iraqi police after one of their own was killed in gunfire exchange. The two plainclothes operatives refused to state the mission they were on and their car has been reported as being full of explosives.
In attempting to forcefully free their compatriots, British forces came under attack from Iraqis; causing their very own demise while attempting to undermine the very force attempting to keep order under occupation.
The SAS are not in the business of running patrol duty. These are specialists who are trained and experienced in covert and undercover operations.
Their training includes extensive psychological preparations and methodology to use psyops effectively as required.
Read more here, here, or here.