Simple two parameter description of lepton mixing

We note that a simple two parameter description of lepton mixing is possible, which reproduces the features that apparently emerge from global fits at the 1σ level: if U_e3 is nonzero, it implies that the solar neutrino mixing parameter sin⁡²θ₁₂ is less than 1/3 by order |U_e3|². If the CP phase δ is around π, it implies that the atmospheric neutrino mixing parameter sin⁡²θ₂₃ is less than 1/2 by order |U_e3|. The mixing scheme can be described by a 23-rotation appearing to the right of a tri-bimaximal mixing matrix. We quantify the excellent agreement of the scheme with data statistically, and comment on model building aspects.