We had the press conference this morning for our Ai Weiwei exhibition in which all of the world’s press, including the television stations, descended on the RA, as will probably be evident from the news programmes later today.   What was interesting was the quality of the discussion and the fact that it was as much political and cultural as it was artistic.   There was repeated questioning about the emotional impact of his incarceration and inability to travel and a dawning recognition of the significance of the fact that, after more than a hundred exhibitions which he has done internationally over the last four years, this is the first one that he has actually been able to see.