Sorry it took me so long to get back to this – in that copy of the footer.php file, replace this:
<?php do_action( 'spun_credits' ); ?>
<a href="https://www.ads-software.com/" title="<?php esc_attr_e( 'A Semantic Personal Publishing Platform', 'spun' ); ?>" rel="generator"><?php printf( __( 'Proudly powered by %s', 'spun' ), 'WordPress' ); ?></a>
<span class="sep"> | </span>
<?php printf( __( '%1$s by %2$s.', 'spun' ), '<a href="https://carolinemoore.net/" rel="designer">Spun', 'Caroline Moore</a>' ); ?>
with this:
<a rel="generator">
Copyright © <?php echo date('Y'); ?> <a rel="designer" href="https://www.rachelluciegallery.co.uk/">Rachel Lucie Jewellery | All rights reserved | Theme by <a rel="designer" href="https://carolinemoore.net/">Caroline Moore</a>
</a>