Here is an extract from her funny but informative article:
"...you get a heck of a lot of water from food. Fruit and vegetables can contain up to 95 per cent water. Cucumber is water, more or less, but in the shape of a stick. A jacket potato contains 70 per cent water. An egg is 70 per cent. Chicken is 65 per cent. On average, we all consume a litre of water every day through food, plus our bodies produce water metabolically. So, is there any scientific research showing that above and beyond what we might eat and drink we also need to drink two litres of water a day? The answer, in short, is no."
Link to article: http://www.independent.co.uk/life-style/food-and-drink/features/the-water-myth-debunking-the-dilution-solution-2121712.html