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We present the results of recent work on the central exclusive production ofmeson pairs. We concentrate on the case of flavour-singlet pseudoscalar mesonseta, eta' and show that the central exclusive process, as modelled using arecent novel application of the 'hard exclusive' perturbative formalism, ispotentially highly sensitive to the size of the gluon content of these states.We also discuss the exclusive production of meson pairs in the lower massregion, and present the first results of the new Dime Monte Carlo.

Exclusive meson pair production and the gluonic component of the eta, eta' mesons