Recent results of divertor modelling are summarized and some modelling results incorporated in the ITER-FEAT divertor design, such as the beneficial effect of V-shaped targets, the importance of high gas conductivity between the divertors, and the role of deep core fuelling in maintaining the plasma density, are discussed. Differences between carbon and seeded impurities are pointed out, and the beneficial effect of helium elastic scattering is demonstrated. A number of considerations for modelling reactor-like operation and additional requirements imposed on the code under these conditions are discussed.