Err the last time they had a strike when the green goddesses where deployed I was still in, they sent candidates to Saints to the then driving school, they drove across the parade square circled around an instructor pulled up between 2 cones got out to be issued with an HGV, next man got in and did the same to the other side of the square..
The last tanker drivers one they had a mate in the cab with a pick axe handle in case any strikers got stroppy on the picket lines..