Francis Davey offers another detailed legal overview, more cautious about WMF’s prospects but with good advice for how they might tackle the case -
http://www.francisdavey.co.uk/2009/07/national-portrait-gallery-photographs.html
Cory at Boing Boing gives a historical and philosophical view -
http://www.boingboing.net/2009/07/20/uk-national-portrait.html
If it costs more to promote British culture, British culture will lose out to the competition. There’s a reason why British literature and European folk tales were so popular in American popular culture of the nineteenth and twentieth centuries; neither was covered by copyright when they were appropriated.