Sometimes it's necessary to understand when and who allocation/unallocated carers from bookings.
Open the carer's Agenda tab, then click the three-dot menu in the top-right of the agenda, and then click View History.
The history page will show each time a carer was allocated or unallocated from a booking or a shift. By default it will show the current week, though the date range can be changed. You can also change the Subject and Action to filter the list further.