ised). In such a case, the law makes three main points: • there must be supervision by a person who is in regulated activity iii • the supervision must be regular and day to day; and • the supervision must be “reasonable in all the circumstances to ensure the protection of children”. The organisation must have regard to this guidance. This gives local managers the flexibility to determine what is reasonable for their circumstances. While the precise nature and level of supervision will vary from case to case, guidance on the main legal points above is as follows. Supervision by a person in regulated activity/regular and day to day: supervisors must be in regulated activity themselves iv. The duty that supervision must take place “on a regular basis” means that supervision must not, for example, be concentrated during the first few weeks of an activity and then tail off thereafter, becoming the exception not the rule. It must take place on an ongoing basis, whether the worker has just started or has been doing the activity for some time. Reasonable in the circumstances: within the statutory duty, the level of supervision may 182 differ, depending on all the circumstances of a case. Organisations should consider the following factors in deciding the specific level of supervision a person will require: • ages of the children, including whether their ages differ widely • number of children that the individual is working with • whether or not other workers are helping to look after the children • the nature of the individual’s work (or, in a specified place168 such as a school, the individual’s opportunity for contact with children) • how vulnerable the children are (the more they are, the more an organisation might opt for workers to be in regulated activity), and • how man