Recent results on lepton flavour universality from the LHC experiments are presented. The first angular analysis of a $b \to s e^+ e^-$ transition at the LHCb experiment has been performed in the $B^0 \to K^{*0} e^+ e^-$ decay. Similarly, the angular analysis of the $B_s^0 \to \phi e^+ e^-$ decay allowed the first measurement of four angular observables in three regions of the dilepton invariant mass squared. Additionally, the LFU ratio $R(\phi)$ has been measured in the same $q^2$ regions.
The CMS collaboration performed the first measurement of $R(K)$ using the Run 2 dataset collected by the CMS experiment.
LHCb performed a simultaneous measurement of $R(D^+)$ and $R(D^{*+})$ using $\tau$ leptons reconstructed in the muonic decay channel. This result contributes to a list of measurements of these ratios performed by the Belle, Belle II and LHCb experiments.
Furthermore, CMS performed two measurements of the $R(J/\psi)$ ratio in the $B_c^+ \to J/\psi \ell \nu$ decays, one using a muonic reconstruction of $\tau$ leptons, the other using the hadronic $\tau$ decay channel.