—Case names are generally assigned by a randomisation process. Numbers are generated by drawing on the decay of a sample of radioactive isotope held in a sealed environment in Oxfordshire. These numbers are then used to select words from the full English lexicon which is also randomised. Names are rejected occasionally on the basis of cultural appropriateness. It would not be acceptable to have an operation codenamed "fart." Some use-criteria are also applied to avoid polysyllabic scientific jargon and so on.