Blair's popularity over his 10 years, as measured by Ipsos Mori, tells an interesting story of dips and troughs and the expected long term decline that every prime minister would receive. But does this mean anything? Apart from support for a leader seems to increase in both times of crisis and triumph, not a lot on its own. It only means anything when compared to expected satisfaction under the competition. Clearly in 2001 and 2005 Blair may not have scored 50% in the satisfaction ratings but he was liked more than the alternative. Interesting that his lowest score came days before his departure, not post Hutton or the Fuel Tax protests, it shows that perceptions are cumulative and no one event can turn public opinion, it is a tide that leaders surf.