Radiation from Impurities in magnetically confined fusion devices is regularly utilised on existing tokamaks for both diagnostic purposes (to reveal plasma conditions) and to estimate the impurity content itself to detect any detrimentally high radiation power losses. For the light elements (Z <8) commonly found in tokamaks the atomic physics infrastructure to allow such observations and model the results is well developed. The proposed design for ITER calls for a partially tungsten divertor. This has led to a resurgence of interest in the behaviour of heavy impurities in plasma. Many codes for generating fundamental atomic data and for modelling plasma behaviour encounter significant difficulties when dealing with heavy elements. This work addresses some of these issues.