I am definitely editing the right file (checked another change which displayed correctly).

Also, I emptied the cache, history etc of the browser, still no change in the width of the button_back style.

I can override other button styles, but not this one. I notice that it is governed by a <span> whereas other buttons are styled in the <input> tag.

Can you confirm that you can change the width of this button (eg bottom left "button_back" of the Advanced Search page)?

Unfortunately, I can't give you a URL, as the site is hosted internally at this stage.

Any other suggestions??