Alastair in icy waters

Alastair survived his plunge into icy waters at Battery Rocks in Penzance.

He says: "Once I was numb it was exhilarating. I even went back in for a second dip."

The Guardian is covering the escapade and we'll let you know when video evidence appears online.

Thanks for your well-wishing and tips... The temperature on that day was 4 degrees, by the way!

Photo courtesy of The Guardian

Alastair Sawday

Tomorrow I am wading into the freezing ocean at Battery Rocks in Cornwall in the company of a stoic 70-year-old woman who swims there every day. For unmentionable reasons I feel bound to stick to the plan whatever the weather. Does anyone have any tips that might save me from agony and total humiliation?