Previously I thought that a search box only appeared when a domain was enough of an authority to get sitelinks.
Legal and General is being given a site search box without having sitelinks, I can’t see any other examples of this happening though.
They could have deleted the sitelinks manually in the Webmaster Cental (for whatever reason).
Ha, I think they must have your post. Check
out that Google search again: http://www.google.co.uk/search?hl=en&q=legal+and+general&btnG=Google+Search&meta=
Mail (will not be published) (required)