Redirect requests to parked domain

[stuartmarsh]

I have a main domain on a .co.uk and a parked domain on .com.

I have a .htaccess setup that redirects the .com and the domain without the www to my main domain.

However, I can still access pages through domain.com/aboutus.html when I want it to redirect it to www.maindomain.co.uk/aboutus.html.

RewriteEngine on
RewriteCond %{HTTP_HOST} ^Domain.com$ [OR]
RewriteCond %{HTTP_HOST} ^www.Domain.com$ [OR]
RewriteCond %{HTTP_HOST} ^MainDomain.co.uk$
RewriteRule ^/?$ "http\:\/\/www\.MainDomain\.co\.uk" [R=301,L]
#Routes pages through the index.php
RewriteRule ^(.+)\.html$ index.php?file=$1 [NC]

Can anybody tell me how to modify this so that it redirects page requests to my main domain?

 

Cheers,

Stu