Exotic meson studies at LHCb

The latest years have seen a resurrection of interest in searches for exotic states motivated by tantalising observations of several states. Using the $pp$ collisions data collected at 7 and 8 TeV by the LHCb experiment, we performed studies of the $X(3872)$ decay rate to $\psi (2S ) \gamma$ final state, as well as confirmation the $Z(4430)^+$ state