I’m parked at a well known Wiltshire truck stop and a flat bed artic from Kent pullls in full of pallets of what look like mortar mix in 20kg bags
Every row was strapped but the rear 2 were only double strapped but not crossed strapped !
Forgive me but have things changed in the year since I gave up general haulage to be a box jockey or not ?
It’s a very sound old-school practice, but one that hasn’t filtered down to the newer generations of drivers. TBH load securing on the whole is (unwisely) not taken seriously by a lot of newer generation drivers, it’s almost as if Sir Isaac Newton never had any ideas about laws of motion…
Old-school drivers generally know what you mean if you say “saltire”, newer drivers just give you a blank look.
I have posted American pictures on TN in the past and it seems that even front crosses are foreign to them.
My opinion is that there should always be a cross both front and rear. Even 2 straps on a rear stack will not prevent that stack from falling backwards in some circumstances. The vertical straps do not have to wander far from their arc to go with a topple.
Sticking on the Scottish theme I was taught to use a Dundee if I felt it was needed.
I’m prepared to go with the thought of using a Scottish weapon to secure a load, but I fail to see what good at all a crocodile would do! 
I did a Dundee if I had a bit left over, but didn’t start a new rope just to do it. An excellent way to get the ultimate tightener on the cross you have already done though, so perhaps, looking back, I should have carried one special short bit just for that. 