Update, 13 December 2013: New Zealand customs have denied the seizure of Samuel Blackman's electronic equipment had anything to do with his attendance at the Riba conference. A spokeswoman said:

I can categorically say that the reason New Zealand customs detained Sam Blackman’s electronic equipment at the border was absolutely nothing to do with any conference he had been to in the UK, and nothing to do with any information security issue.

She said Blackman was "already well aware" of the nature of the customs authorities' interest, "although he does not seem to be choosing to discuss that with the media". She said she could not discuss it without his permission.