In your Virtual Host declaration add a ServerAlias under your ServerName declaration for example you would have

ServerName www.domain.co.uk
ServerAlias domain.co.uk

This on it's own would mean that visitors will be sent to your site with or without the www. prefix.

What we can do is take the url they entered for example domain.co.uk/news/wow-look-at-this
and rewrite it to
www.domain.co.uk/news/wow-look-at-this

All you need to do is; within your .htaccess file for the site add the following at the top

RewriteCond %{HTTP_HOST} ^domain\.co.uk
RewriteRule ^(.*)$ http://www.domain.co.uk/$1 [R=301,L]

Rewrite your urls for domain.co.uk to www.domain.co.uk including full url

301 Rewrite domain.co.uk to www.domain.co.uk like the search engine friendly developer you are!

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