  In addition to the existing strong indications for lepton flavour university
violation (LFUV) in low energy precision experiments, CMS recently released an
analysis of non-resonant di-lepton pairs which could constitute the first sign
of LFUV in high-energy LHC searches. In this article we show that the Cabibbo
angle anomaly, an (apparent) violation of first row and column CKM unitarity
with $\approx3\,\sigma$ significance, and the CMS result can be correlated and
commonly explained in a model independent way by the operator $[Q_{\ell
q}^{(3)}]_{1111} =
(\bar{\ell}_1\gamma^{\mu}\sigma^I\ell_1)(\bar{q}_1\gamma_{\mu}\sigma^Iq_1)$.
This is possible without violating the bounds from the non-resonant di-lepton
search of ATLAS (which interestingly also observed slightly more events than
expected in the electron channel) nor from $R(\pi)=\pi \to\mu\nu/\pi \to e
\nu$. We find a combined preference for the new physics hypothesis of
$4.5\,\sigma$ and predict $1.0004<R(\pi)<1.0009$ (95\%~CL) which can be tested
in the near future with the forthcoming results of the PEN experiment.
