htaccess redirect appending old url to new - php

Question

Website is using expression engine, trying to add some simple 301 redirects using the below code;
Redirect 301 /contact-us/ http://www.website.co.uk/get-in-touch
This is returning the following url;
http://www.website.co.uk/get-in-touch?contact-us
I cannot find why this is doing this, I have also tried;
RewriteRule ^/contact-us/$ http://www.website.co.uk/get-in-touch [R=301]
RedirectMatch 301 ^/contact-us/?$ http://www.website.co.uk/get-in-touch
Both return the same result, the htaccess as a whole;
<IfModule mod_rewrite.c>
RewriteEngine On
# Removes index.php from ExpressionEngine URLs
RewriteCond $1 !\.(gif|jpe?g|png)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
#enforce the www's
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>
RewriteRule ^/contact-us/$ http://www.website.co.uk/get-in-touch [R=301]
#RedirectMatch 301 ^/contact-us/?$ http://www.website.co.uk/get-in-touch
#Redirect 301 /contact-us/ http://www.website.co.uk/get-in-touch

Answer 1

Your first RewriteRule appears to trick you.
A simple switch in the order should fix it. My general rule of thumb: External redirects first, internal rewrites second.
So in your case:
<IfModule mod_rewrite.c>
RewriteEngine On
# Redirect /contact-us to /get-in-touch
RewriteRule ^contact-us(/?)$ /get-in-touch [L,R=301]
# Removes index.php from ExpressionEngine URLs
RewriteCond $1 !\.(gif|jpe?g|png)$ [NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
#enforce the www's
RewriteCond %{HTTP_HOST} !^$
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{HTTPS}s ^on(s)|
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
</IfModule>