  Central exclusive J/{\psi} and {\chi}c meson production has been measured in
decays to dimuons with the LHCb detector, in data corresponding to 36 /pb of
integrated luminosity from \sqrt{s} = 7 TeV proton-proton collisions.
Cross-section measurements for J/{\psi}, {\psi}(2S) and {\chi}c0,c1,c2
production are presented, and the J/{\psi} photoproduction cross-section is
measured as a function of the photon-proton centre-of-mass energy and compared
to measurements made at HERA.
