We make non perturbative estimates of the electroweak radiative correction
parameter S in dynamical symmetry breaking models with Majorana neutrino
masses. The Majorana masses are treated as perturbations to a Non Local Chiral
Model of the strong interactions. We argue that parameter ranges exist that
would allow realistic values of S and T in one family Technicolour models.Comment: 15 pages plus appended diagrams (ps), Latex, SHEP 92/93--2