Lepton Flavour Universality tests using semitauonic decays at LHCb

<!--HTML--><p>Tests of Lepton Flavour Universality are a sensitive probe for physics beyond the Standard Model (SM). Experimental tests of this feature in semitauonic b-hadron decays, such as $B \to D^\ast\tau\nu$, are sensitive to new particles that preferentially couple to the third generation of leptons.&nbsp; The world average for the ratios $\mathcal{B}(B \to D^{(\ast)}\tau\nu)\,/\,\mathcal{B}(B \to D^{(\ast)}\mu\nu)$ deviates from the very precise prediction of the SM by about 4 sigma, making this one of the most intriguing hints of potential new physics effects in the flavour sector.<br /> The latest results on the measurement of semitauonic decays at LHCb are&nbsp; presented, along with future prospects.</p>