The World This Weekend - 31/01/2010

It has been a uncomfortable week for defenders of the consensus on climate change: the University of East Anglia was criticised by the Information commissioner for withholding data requested by a climate change sceptic. The UN's International Panel on Climate change faced further embarrassment over the research it used to predict, inaccurately, the melting of Himalayan glaciers; and there were also revelations that rather than quote original research by scientists on the Amazon Rainforest the IPCC referenced a World Wildlife Fund paper. The climate secretary Ed Miliband tells us that the recent controversies have been damaging but it would be 'profoundly irresponsible' to allow them to undermine decades of climate research. Presenter Jonny Dymond visits Cyprus to find out more about the reunification talks and what they mean to Turkey's chances of EU membership. And on the day when Andy Murray was beaten in the Australian Open by Roger Federer, we learn more about Britian's last Grand Slam winner, Fred Perry.