  We present a novel method for the reconstruction of events containing pairs
of hadronically decaying tau leptons at collider experiments. This method
relies on accurate knowledge of the tau production vertex and precise
measurement of its charged decay products. The method makes no assumptions
about the centre-of-mass or invariant mass of the tau pair, and is insensitive
to momentum loss along the beam direction. We demonstrate the method using e+e-
-> mu+ mu- tau+ tau- events fully simulated in the ILD detector.
