Alchymyth - thanks very much for your response.
Tried that in several differentways - but it just seemed to throw everything all over the post - bit like a car crash.
Anyway - I have now restored things to exactly how they were before.
It seems (to my uneducated eye) that there is a 'what-if' instruction in 'single.php' that refers to 'blueberry_sidebar'.
Here is the code from single.php
++++++QUOTE+++++++++++
<?php get_header(); ?>
<div id="content" class="<?php blueberry_sidebar(); ?>">
<?php if ( have_posts() ) { while ( have_posts() ) { the_post(); ?>
<div class="navigation">
<div class="alignleft"><?php previous_post_link('« %link') ?></div>
<div class="alignright"><?php next_post_link('%link »') ?></div>
</div>
<div class="post" id="post-<?php the_ID(); ?>">
<h2><?php the_title(); ?></h2>
<div class="entry">
<?php
the_content('<p>Continue reading ' . the_title('', '', false) . ' »</p>');
wp_link_pages(
array('before' => '<p>Pages: ',
'after' => '</p>',
'next_or_number' => 'number'
)
);
?>
</div><!-- .entry -->
<p class="postmeta center">
" title="<?php the_title(); ?>" rel="bookmark">
<?php the_title(); ?> was posted on <?php the_time('l, F jS, Y') ?> at <?php the_time() ?>.
This post is tagged <?php the_tags('', ', ', ''); ?> and is filed under <?php the_category(', '); ?>.
You can follow the replies through the <?php post_comments_feed_link('comments feed'); ?>.
<?php blueberry_response(); ?>
</p>
</div><!-- .post #post-<?php the_ID(); ?> -->
<?php } } else { ?>
<h2 class="center">Not Found</h2>
<p class="center">Sorry, but you are looking for something that isn't here.</p>
<?php } ?>
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<?php comments_template(); ?>
<?php endwhile; else: ?>
<p>Sorry, no posts matched your criteria.</p>
<?php endif; ?>
</div>
<?php if ( get_option('blueberry_sidebar') ) { get_sidebar(); } ?>
<?php get_footer(); ?>
+++++++UNQUOTE+++++++
Does this make a course of action any clearer ??
Many thanks for your help - it's much appreciated.
Kind regards
Bill Smith