Transport frame and method; the transport frame having a longitudinal, lateral and upright extent, and being configured for receiving a tip portion of a longitudinally extending wind turbine blade, said frame being stackable with identical frames, said frame having a tip saddle assembly comprising a saddle with a support surface shaped to receive a blade tip with its chordwise extent lying approximately horizontal, and a clamping mechanism having a hinged clamping arm configured to be operable between a raised, open position and a lowered, closed position; said clamping arm, when open, allowing a blade tip to be lowered into said saddle with its chordwise extent generally horizontal, and when closed, securely restraining said blade tip against upward movement; said clamping arm extending between a hinge point and a free end; said tip saddle assembly further including a preventer serving to maintain said clamping arm in said closed position over a blade and which preventer has a middle portion extending between a first end and a second end; and wherein said tip saddle assembly further includes a fixing for respective said first and second end of said preventer; said tip saddle assembly being configured such that said preventer exerts a downward force on said clamping arm when a middle portion thereof passes under tension over a portion of said clamping arm between said hinge point and said free end, and wherein said preventer is anchored at said first and said second ends to said tip saddle assembly.