The course was 160 laps of the Inner Circle in Regents Park, one of the main parks in central London. Tom figured out a vertical gain of 7 metres a lap, so a surprising 1120 metres in all! ;-)

We had a great time in perfect conditions although I think we all underestimated the mental challenge of doing something so repetitious - the 70-90 mile period was pretty tough (every kilo a prisoner!). Very glad it's over but we're unanimous in being very glad that we took part!