Pagination not working on custom template?

I’m using a custom page template with the following code, but when I press older or newer entries the page doesnt update (however it does change the URL)

<ul>
<?php query_posts('cat=11'); while (have_posts()) : the_post(); ?>
<li>
CONTENT
</li>
<?php endwhile; ?>
</ul>

<ul>
<li><?php next_posts_link('&laquo; Older Entries') ?></li>
<li><?php previous_posts_link('Newer Entries &raquo;') ?></li>
</ul>

Anyone know why it’s not working properly and how I can fix this?

(you can see the issue at https://www.wiredbristol.com/restaurants/)

Thanks