Opinion Polls
I pointed out during the election campaign that the last poll of the 2003 campaign had over-estimated Plaid's vote and under-estimated the Tories. So did the final poll this time - over-estimating Plaid by about 4% and under-estimating the Tories by 3%.
However, it also over-estimated our share - and the ITV recall poll got that right. So I need to learn more about recall polls.