When it hasn't stopped raining for weeks and the thermometer is hovering around the horribly cold end of the spectrum, it can be even harder to ignore those naughty food cravings when you're trying to diet.

Somehow a handful of grapes just doesn't cut it when you've come back from a jog in a howling gale and are soaked to the skin. Don't be put off by your rumbling stomach, just try one of these five delicious - and warming - snacks. Each one is less than 200 calories, so they won't ruin your weight loss plans.

If you're in the mood for something savoury, how about some guilt-free nachos? Take a small handful of baked tortilla chips and top with 25g cheddar cheese. Stick them under the grill until melted and add a tablespoon of salsa.

Popcorn is another great post-workout snack. A small bowl of popcorn has under 100 calories, as long as it's not smothered in melted butter. Leave off the salt and add a sprinkling of mild chilli powder to spice it up.

For something more substantial have a delicious tuna melt. Mix two tablespoons of tuna (canned in water) with half a chopped spring onion and spread on half a wholemeal muffin, then top with a teaspoon of grated edam or cheddar and put under the grill for 1 minute.

When you have a craving for something sweet, mix a tablespoon of drinking chocolate with skimmed or soya milk and heat. For an extra kick, add a sprinkling of cinnamon.

Alternatively, chop an apple into small pieces, add some water and cook over a low heat until mushy. Add a teaspoon of honey or agave nectar and serve with three tablespoons of low-fat yoghurt.