  Results are presented from an ongoing study of the $\rho$ resonance. The
focus is on CLS 2-flavour ensembles generated using $\mathcal{O}(a)$ improved
Wilson fermions with pion masses ranging from $265$ to $437$ $\mathrm{MeV}$.
The energy levels are extracted by solving the GEVP of correlator matrices,
created with the distillation approach involving $\rho$ and $\pi\pi$
interpolators. The study is done in the centre-of-mass frame and several moving
frames. One aim of this work is to extract the timelike pion form factor after
applying the L\"uscher formalism. We therefore plan to integrate this study
with the existing Mainz programme for the calculation of the hadronic vacuum
polarization contribution to the muon $g-2$.
