These are very difficult questions to answer, and at present we cannot answer your questions. We have sought clarification on the relevant Act and have also approached a number of other places such as anatomy departments, mortuaries and museums for advice. The possession of human skeletons by schools appears to be a grey area with no clear guidelines. Most of the relevant legislation covers human tissue material obtained through autopsies and by patient consent after surgical procedures and we are therefore continuing with our research regarding the legality of acquisition and possession of human skeletons in schools. We previously answered a question on the disposal of a human skeleton see Cremated skeleton, which contains some related information and links that may be helpful.
We will update this post when we have some further information.