  Supersymmetric left-right models are well motivated extensions of the Minimal
Supersymmetric Standard Model since they automatically contain the ingredients
to explain the observed neutrino masses and mixings. Here we study a SUSY model
in which the left-right symmetry is broken by triplets at a high scale leading
to automatic R-parity conservation at low energies. The sparticle spectra in
this model differ from the usual constrained MSSM expectations and these
changes affect the relic abundance of the lightest neutralino. We discuss two
examples: (1) the standard stau co-annihilation region, and (2) flavoured
co-annihilation.
