A non-linear transition lining element (200,300) for use in a haul truck body lining, which lining comprises a plurality of main lining elements, wherein said transition lining element (200,300) being arranged to form a lining transition between adjacent main lining elements of said lining; said transition lining element (200,300) comprising: a main surface (205,305); a central portion (210,310); a first leg portion (211,311) and a second leg portion (212,312) which extend from the central portion (210,310) in non-parallel first (221,321) and second (222,322) leg directions, respectively, said first leg portion (211,311) presenting a first end surface (231,331) which extends transversely of the first leg direction (221,321) and connects to the main surface (205,305), and a first pair of non-parallel side surfaces (241a,241b; 341a,341b) which extend from the central portion (210,310) to the first end surface (231,331) and connect to the main surface (205,305), and said second leg portion (212,312) presenting a second end surface (232,332) which extends transversely of the second leg direction (222,322) and connects to the main surface (205,305), and a second pair of non-parallel side surfaces (242a,242b; 342a,342b) which extend from the central portion (210,310) to the second end surface (232,332) and connect to the main surface (205,305); characterised in that: said first (231,331) and second (232,332) end surfaces being arranged to connect to matching end surfaces of adjacent transition lining elements extending in said first (221,321) and second (222,322) leg direction, respectively, and said non-parallel side surfaces (241a,241b,242a,242b; 341a,341b,342a,342b) being arranged to connect to matching surfaces of adjacent main lining elements of said plurality of main lining elements, said first leg portion (211, 311) being arranged to form a first lining transition in a first transition direction between a first pair (210a,210b) of main lining elements connecting to said first pair of non-parallel side surfaces (241a,241b; 341a,341b) of the first leg portion (211, 311), and said second leg portion (212, 312) being arranged to form a second lining transition in a second transition direction, different from said first transition direction, between a second pair (210a,210c) of main lining elements connecting to said second pair of non-parallel side surfaces (242a,242b; 342a,342b) of the second leg portion (212, 312). a main surface (205,305); a central portion (210,310); a first leg portion (211,311) and a second leg portion (212,312) which extend from the central portion (210,310) in non-parallel first (221,321) and second (222,322) leg directions, respectively, said first leg portion (211,311) presenting a first end surface (231,331) which extends transversely of the first leg direction (221,321) and connects to the main surface (205,305), and a first pair of non-parallel side surfaces (241a,241b; 341a,341b) which extend from the central portion (210,310) to the first end surface (231,331) and connect to the main surface (205,305), and said second leg portion (212,312) presenting a second end surface (232,332) which extends transversely of the second leg direction (222,322) and connects to the main surface (205,305), and a second pair of non-parallel side surfaces (242a,242b; 342a,342b) which extend from the central portion (210,310) to the second end surface (232,332) and connect to the main surface (205,305); said first leg portion (211,311) presenting a first end surface (231,331) which extends transversely of the first leg direction (221,321) and connects to the main surface (205,305), and a first pair of non-parallel side surfaces (241a,241b; 341a,341b) which extend from the central portion (210,310) to the first end surface (231,331) and connect to the main surface (205,305), and said second leg portion (212,312) presenting a second end surface (232,332) which extends transversely of the second leg direction (222,322) and connects to the main surface (205,305), and a second pair of non-parallel side surfaces (242a,242b; 342a,342b) which extend from the central portion (210,310) to the second end surface (232,332) and connect to the main surface (205,305); said first (231,331) and second (232,332) end surfaces being arranged to connect to matching end surfaces of adjacent transition lining elements extending in said first (221,321) and second (222,322) leg direction, respectively, and said non-parallel side surfaces (241a,241b,242a,242b; 341a,341b,342a,342b) being arranged to connect to matching surfaces of adjacent main lining elements of said plurality of main lining elements, said first leg portion (211, 311) being arranged to form a first lining transition in a first transition direction between a first pair (210a,210b) of main lining elements connecting to said first pair of non-parallel side surfaces (241a,241b; 341a,341b) of the first leg portion (211, 311), and said second leg portion (212, 312) being arranged to form a second lining transition in a second transition direction, different from said first transition direction, between a second pair (210a,210c) of main lining elements connecting to said second pair of non-parallel side surfaces (242a,242b; 342a,342b) of the second leg portion (212, 312).