The definition of a group is based on the provisions in
ICTA88/S240.
A group consists of:
A company cannot be the parent company of a group if it is itself a 51% subsidiary of another company, and:
The parent company is the top company within the group. While no other member can be the parent company of that group they may be the parent company of another group. That would happen where a company that was a member of a group had one or more 51% subsidiaries which were not also members of the group in which it was a 51% subsidiary.
A company is a 51% subsidiary if it is: