Thanks. I managed to resolve this myself thanks to your advice.
For anyone who is interested, I just did the following:
function clear_button( $field ) {
echo '<p><a href="#" class="acf-button button button-primary acf-gallery-clear">Clear Images</a></p>';
}
add_action( 'acf/render_field/type=gallery', 'clear_button', 10, 1 );
function my_acf_input_admin_footer() {
?>
<script type="text/javascript">
(function($) {
$('.acf-gallery-clear').click(function() {
$('.acf-gallery-remove').click();
});
})(jQuery);
</script>
<?php
}
add_action('acf/input/admin_footer', 'my_acf_input_admin_footer');
This just clears the images from the gallery rather than deletes them off the website which I may do in the future but for now I just needed a way of starting again with the gallery.
