  The associated production of a J/psi and a photon in photon-hadron collisions
is considered, and shown to be a good probe of the presence of colour-octet
mediated channels in quarkonia production, as predicted by the factorization
approach within NRQCD. Total and differential cross sections for
photoproduction at fixed target experiments and at HERA are presented.
Associated J/psi + gamma production at hadron colliders is briefly discussed.
