Dieting can take so much time and extra energy – two things that busy mums have very little of. Working out what you can and can't eat, sourcing and buying special foods, weighing out portions and having to prepare complicated recipes is just too much to stick with when you have a packed schedule and a family to look after.

New online diet plan JustSlim takes the hard work out of losing weight. Designed by nutritionist and former GB athlete and TV Gladiator Caroline Pearce, JustSlim combines your personal data, weight loss target and food preferences to create personalised menus and delicious, healthy recipes.  

Shuffle your recipes until you're happy with your weekly menu, then let JustSlim create a shopping list so you know exactly what you need for the week. With JustSlim everything you eat is made from healthy, everyday ingredients, so you can buy it all at the supermarket. All the recipes are quick and easy so they can be made in a matter of minutes. You can also upsize the recipe and feed your family the same healthy meals.

As you start losing weight and your body changes, your JustSlim plan changes with you.  JustSlim matches your menus to your daily calorie needs so you can be sure you are always on course to reach your target weight.

JustSlim costs from only £9.95 per month for an annual membership. Everyone can enjoy a free trial at www.justslim.net

For a chance of winning a six month membership (worth £78) or a three month membership (worth £45) simply answer this question:

Who designed the JustSlim programme?

Enter here

Winners will be the senders of first and second email opened at random after 4pm on Thursday 21 April, 2011. Only one entry per household.