Past Present and in Between in Pictures (Part 2)

UK PROFESSIONAL DRIVERS FORUMS OLD TIME LORRIES, COMPANIES AND DRIVERS (INTERACT
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If this picture is anything to go by, the loads were not necessarily sheeted:

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I actually found a Tunnel Cement thread on here, but it gives us no clues as to sheeting arrangements:

Tunnel Cement / Castle Cement - Padeswood, Mold - UK PROFESSIONAL DRIVERS FORUMS / OLD TIME LORRIES, COMPANIES AND DRIVERS (INTERACT - Trucknet UK