  A method for analysing the hadronic resonance contributions in $\bar{B}^{0}
\rightarrow \bar{K}^{*0}\mu^{+}\mu^{-}$ decays is presented. This method uses
an empirical model that relies on measurements of the branching fractions and
polarisation amplitudes of final states involving $J^{PC}=1^{--}$ resonances,
relative to the short-distance component, across the full dimuon mass spectrum
of $\bar{B}^{0} \rightarrow \bar{K}^{*0}\mu^{+}\mu^{-}$ transitions. The model
is in good agreement with existing calculations of hadronic non-local effects.
The effect of this contribution to the angular observables is presented and it
is demonstrated how the narrow resonances in the $q^{2}$ spectrum provide a
dramatic enhancement to $CP$-violating effects in the short-distance amplitude.
Finally, a study of the hadronic resonance effects on lepton universality
ratios, $R_{K^{(*)}}$, in the presence of new physics is presented.
