Select the tutor of interest.
The tutor highlighted is currently in the school group ("Orchard Academy").
Click on "Share tutor".
Check out the "Parent group".
The "Parent group" is the group the tutor is currently in.
Click on the group.
This will open a drop-down menu to change the group.
Click "Update" to change the group.
Once a new group has been selected, the "Update" button should highlight.