Andy_Langton - 12:25 am on Mar 12, 2013 (gmt 0)
As implied above, using a robots HTTP header in addition to a 410 status code is redundant at best and open to confusion at worst. Your server response is going to look like this:
HTTP/1.1 410 Gone
Date: Tue, 12 March 2013 21:42:43 GMT
So after you say the URL is gone, you will also suggest not indexing it. But no search engine indexes pages with 4xx status codes, so there is no point in also including a robots HTTP header.
Perhaps if you explain why you think this is a good idea we can offer alternate suggestions.