RR bids for advanced fighter engine work

This has been trailed over the past week or so:

http://www.aviationweek.com/Article.aspx?id=/article-xml/awx_07_10_2012_p0-475159.xml

Now, I know things aren’t as simple as they seem, but if RR is after advanced engine work in the US is it free to offer the same technology (developed after it’s work on US government projects) to the UK (for example)?