v-data-table - How to pass a custom 'items-per-page-options' to the footer slot:top

[rich06]

(Vuetify v2)

I have a v-data-table with a custom footer options defined for pagination - mainly the options in the dropdown and the 'all' text. The footer options are defined thus:-

            footerOptions: {
                itemsPerPageOptions: [10, 20, 50, 100, -1],
                itemsPerPageAllText: 'All users',
                itemsPerPageText: 'No. of users per page',
            }

The v-data-table has this definition:-

                    <v-data-table
                            dense
                            :headers="headers"
                            :items="users"
                            :hide-default-footer="false"
                            :options="options"
                            :footer-props="footerOptions"
                            item-key="name"
                            class="elevation-1"
                            disable-sort>

The problem is trying to use the top slot on the footer to duplicate the pagination controls at the top of the list. It seems the top version ignores the footerOptions and uses default values - anyway the v-data-footer is defined thus:-

                        <template v-slot:top="{ pagination, options, footerOptions }">
                           <v-data-footer
                               :pagination="pagination"
                               :options="options">
                           </v-data-footer>
                         </template>

Am I missing something here? How do I get the top slot to pick up the defined footerOptions?

Thanks for any pointers.