The government is trying to make recommendations; but their advice regarding fat can be damaging. It suggests reducing fat and saturated fat in the diet but the message needs to be to reduce polyunsaturated fats. Overconsumption of these fats can lead to serious health issues.
For your own health and that of your children, please read up on the science.
Here is one, of many, sources http://openheart.bmj.com/content/1/1/e000032.full