Measurement of $\gamma$ from $B \to DK$ decays at LHCb

We report results from the first measurements of the CKM angle $\gamma$ using $B \to DK$ decays with the LHCb experiment. Three well established methods are used to extract the $CP$ observables. The updated measurement of $\gamma$ in the three-body $D^0$ Dalitz space results in $\gamma$ = (57 $\pm$ 16)° at 68%CL and $\gamma \in$ [43.9, 89.5]° at 95%CL. This represents the most precise $\gamma$ values directly measured by a single experiment. Furthermore, a new time-dependent approach using $B^0_s \to D^{\pm}_s K^{\mp}$ decays is used for the first time to measure $CP$ observables and future prospects for $\gamma$ at LHCb are given.