[en] The reaction pp→p_f(ηπ⁺π^-)p_s where the ηπ⁺π^- system is centrally produced has been studied at 300 GeV/c incident momentum at the CERN Ω spectrometer. The ηπ^± mass spectrum shows a strong δ/a₀(980) signal having a mass of 984±4 and Γ=95±14 MeV. The ηπ⁺π^- mass spectrum shows η' and f₁(1285) signals over little background. A spin-parity analysis of the ηπ⁺π^- system shows evidence for a J^PC=1⁺⁺ peak at the f₁(1285) mass but no evidence for the pseudosclar states η(1270) and l/η(1440). No evidence is found for the ηππ decay of the E/f₁(1420) meson for which we set an upper limit BR(E/f₁(1420)→ηππ)<0.1 at 95% cl. (orig.)