The MES on the WHT is university owned, and its continuing development and astrophysical exploitation are the focus of the activity of the Manchester group. Consequently it should not be regarded as the usual common-user devices encountered by the observing community. However, the Manchester group is committed to making them available to a wide number of workers. All that is necessary is for a potential user to contact John Meaburn, Department of Astronomy, University of Manchester before an application for telescope time to work out the suitability of the instrument for the problem in hand. After the award of time a visit to Manchester for an afternoon is strongly recommended to fix residual instrumental details.