Tensions in the flavour sector

Flavour physics is currently well described by the Standard Model except for some measurements which could be signalling new physics. We briefly summarize the status of tensions in rare exclusive semi-leptonic $B$ decays and in $R_{K\mathrm{/}{D}^{(\ast )}}$ ratios. We also address the issue of the long standing tension in the $\mathrm{\mid }{V}_{cb}\mathrm{\mid }$ and $\mathrm{\mid }{V}_{ub}\mathrm{\mid }$ exclusive/inclusive determinations.