BBC is offering some good information on there site on about general nutrition and exercise which can be found here http://www.bbc.co.uk/bigchallenge/

Some in truth is pretty well covered in this site already but it is useful to overlook. The got some good stuff though, and I am not 100% certain (cause I haven't gone through all the info yet) but from what I have gotten through it seems they are leaning towards low-fat and low carb, with less processed carbs.