cscs test is an absolute doddle,I have done it 3 times over the years,revised first one,then did not bother other times(apart from slinger signaller section on my last test).I would guess a random person with an ounce of sense could walk in off the street and pass it.
Cleewindows, safety passport is a 2 day course (boring as hell!!). safety passport is generally only asked for at chemical or petrolium type plants,like bp