Without even looking up the S1 setup, the following is how to determine which is the leading and which is the trailing shoe.
Every drum brake shoe has one end that is attached to a solid anchor, the other is attached to the operating mechanism that pushes it against the drum, in this case a hydraulic cylinder. If you look at the setup and note which way the wheel is turning when going forward, the leading shoe is the one where the motion of the wheel when going forward is pulling the shoe against the fixed anchorage. (Some setups are a bit more complicated, but not on Landrovers). This is also the one that has the adjuster and pull off spring.
Two leading shoe brakes as on the front of later lwb Landrovers simply have two hydraulic cylinders for each brake so that each shoe has its own, and both can be leading shoes.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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