“…costs awarded against one parent or another are exceptional since the court is anxious to avoid the situation where a parent may feel “punished” by the other parent which will reduce co-operation between them. This will only impinge ultimately on the welfare of the child or the children concerned.” “The conduct of the parties is in reality the major consideration when deciding whether or not an exceptional order for costs should be made. It should only be made if the penalised party has been unreasonable in his or her conduct. Moreover the “unreasonableness” must relate to the conduct of the litigation rather than the welfare of the child.” “One has to be very careful in this distinction when, as in the case of the apparent unreasonableness is as a result of the personality of the relevant party. In such circumstances, there is often an overlap of that party’s conduct of the litigation and the conduct relating to the welfare of the child.” “We recognise that irrational behaviour is commonplace in complex contact disputes, and that such behaviour may well be exacerbated by the personality of the individual parent. There is, however, in our judgment, a limit to which allowance can be made for a parent who deliberately and unreasonably obstructs contact by the other parent in circumstances where, on any objective analysis, contact is in the interests of the child and should take place.”