  The three-body charmless hadronic decay $B^0_s \rightarrow K^{0}_{\rm S}
\pi^{+}\pi^{-}$ provides a number of novel possibilities to search for CP
violation effects and test the Standard Model of particle physics. These
include fits to the Dalitz-plot distributions of the decay-time-integrated
final state, decay-time-dependent (but without initial state flavour tagging)
fits to the Dalitz-plot distribution, as well as full decay-time-dependent and
flavour tagged fits. The relative sensitivities of these different approaches
are investigated.
