Professor Ray Bates:

There are now four different sources of global temperature data. I have mainly focused on charts produced by the UK Met Office. It is phrased scientifically, saying that there has been no statistically significant additional global warming for the past 15 years. That is not a sceptical statement about global warming. It just indicates that the sensitivity - both in terms of its extent and timing - may be somewhat different between the observations and the models. It is not a sceptical statement about the effect of greenhouse gases and whether they cause warming - not at all.