Matt Seaton: Pretty serious news the other day for cyclists. According to US research, riding a bike reduces the blood flow to, ahem, vital regions, causing first numbness, then impotence.
It is four years since Alastair Humphreys left England to cycle the world for charity. Having braved the freezing Siberian winter, only the baking desert of Turkmenistan now lies between him and the familiar sights of Europe.