The study groups in this seminar were rather large with well over 30 people in each group. However, they were widely spread in terms of both nationality and experience, and in study group A this resulted in lively and informed discussion. The opinion in the group was that the standard of the papers given at the seminar was very good overall. On the whole, papers were fairly specific and there was no shortage of practical examples . The subject matter of this seminar was intrinsically interesting and most delegates had something to offer from their own experience.