The paper “A non-local formulation of rotational water waves“, co-authored by A.C.L. Ashton and A.S. Fokas, has appeared in the Journal of Fluid Mechanics. They generalise a non-local formulation to the case of constant vorticity, including the case where the surface is multi-valued. The reduction to approximate models, including the KdV equation are also discussed. The paper can be found here.