Rumour has it that the Lynx tail rotor was intended to sweep up into the main rotor downwash at the front edge of its rotation thereby increasing it's aerodynamic effect. It is quoted that the design was transposed to rotate the opposite way by some error during the design/construction phase. Photocopied the wrong way round is one such story!
The Mk1 ran out of tail rotor authority quickly at high AUM/torque as did the Mk1 'GT'.
This was corrected on the conversion to Mk7 and now the benefits are that much greater tail rotor authority is available. Add to this an increase in chord and a benefit is that the length of the blade is reduced significantly and still have greater authority.
Hope this helps,
HEDP