Latest results on flavour physics from ATLAS

Recent results on heavy flavour physics using data from the ATLAS detector are presented. $J/\psi +$ associated $W^{\pm}$, $\psi(2S) \to J/\psi \pi^+\pi^-$, $\chi_{c1}$ \& $\chi_{c2}$ and $B^+ \to J/\psi K^+$ production results are shown as well as the results of analyses of $\Lambda^0_b\rightarrow J/\psi\Lambda^0$, $B^0_d \to K^{*0} \mu^+\mu^-$ and $B^0_s \to J/\psi \phi$ decays. All measurements are based on data collected with the ATLAS detector at the Large Hadron Collider in $pp$ collisions at a centre of mass energy $\sqrt{s} = 7~TeV$.