From James Delingpole:

If there’s anyone left you know who STILL believes in Anthropogenic Global Warming, you might want to show them this chart.
The Central England Temperature dataset is the oldest in the world — with 351 years of temperature records drawn from “multiple weather stations located both in urban and rural areas of England, which is considered a decent proxy for Northern Hemisphere temperatures — not perfect, but decent.” Climate Cycles Change provides the analysis.

The rest here.