A low-calorie tin makes sense for a train journey if you can empty it into a suitable container and heat it when you eat; without heating or boiling water, food that is ready to eat is more practical. Among the tins compared here, Asda lists Weight Watchers from Heinz Tomato Soup at 76 kcal per 295g can, while Tesco lists its Low Fat Tomato Soup at 61 kcal per half-can, or 122 kcal for the full 400g tin. Check salt, allergens and the amount you expect to eat alongside calories.
If you expect to eat the whole tin, compare whole-pack figures rather than serving figures alone. Asda lists 76 kcal for a 295g Weight Watchers from Heinz Tomato Soup tin; Tesco lists 61 kcal per 200g half-can of Low Fat Tomato Soup, making 122 kcal for its 400g tin.
National Rail says passengers may bring their own food. A soup lunch still needs a plan for the container, spoon and any heating or hot water required to prepare it.
Look for a vegetarian suitability statement on the exact soup you buy, then read its allergen declaration separately. A vegetarian label does not establish that a product is milk-free.
Start with the amount you will eat, then check how you will prepare and carry it on your particular journey.
| Priority | What to check | Your needs |
|---|---|---|
| Whole-pack calories | Check the tin size, number of servings and energy for the amount you will eat. Tesco lists 61 kcal per 200g half-can of its 400g Low Fat Tomato Soup. | If the whole tin is my meal, I need its full-can figure: that Tesco tin totals 122 kcal. Asda lists 76 kcal for the smaller 295g Weight Watchers from Heinz tin. |
| Preparation | Read the heating instructions and identify a suitable bowl or cup. Tesco instructs you to empty its soup into a non-metallic bowl for microwave heating; M&S Tomato Soup in a Cup needs boiling water. | A tin works for me only if I can decant and heat it when I eat. With boiling water but no way to heat a tin, I could consider a cup soup instead. |
| Salt and allergens | Read salt for the portion or full pack you intend to eat, and check the exact product’s allergen declaration. Asda lists 1.7g salt per can of Weight Watchers from Heinz Tomato Soup. | Calories alone do not answer my salt or allergen questions; I need the figures and ingredients for the particular pack. |
| Journey facilities | Check catering information for your train service before relying on onboard food or hot water. National Rail says catering availability varies by train company. | When I cannot count on heating or boiling water, I would bring food that is ready to eat rather than depend on soup preparation during the journey. |
Different tin sizes can change the total you eat. Tesco lists 61 kcal per half of its 400g Low Fat Tomato Soup tin, or 122 kcal if you eat both servings; Asda lists 76 kcal for a complete, smaller 295g Weight Watchers from Heinz tin.
Compare energy for the portion you actually plan to eat, then check salt and allergens on that product.
Tesco’s microwave instructions call for a non-metallic bowl, while M&S Tomato Soup in a Cup requires boiling water. National Rail says catering availability differs between train services.
Check your service before travelling. If you cannot prepare the soup when needed, pack food that is ready to eat.
A soup lunch may also mean carrying a suitable container, spoon and used packaging.
Asda lists 76 kcal and 1.7g salt per can for Weight Watchers from Heinz Tomato Soup. The calorie figure does not tell you whether a soup meets your salt or allergen requirements.
Read the salt figure and allergen declaration on the exact pack before choosing it.
Sainsbury’s lists 114 kcal per half-can of its Cream of Tomato Soup, or 228 kcal for the whole tin. That differs from Asda’s stated 76 kcal for a complete 295g Weight Watchers from Heinz Tomato Soup tin.
Check the exact variant and full-pack energy rather than choosing by flavour name alone.
Asda lists Weight Watchers from Heinz Tomato Soup in a 295g tin at 76 kcal per can.
Tesco Low Fat Tomato Soup is a 400g tin listed at 61 kcal per 200g half-can, or 122 kcal for the full tin.
Sainsbury’s lists 114 kcal per half-can of its 400g Cream of Tomato Soup, equivalent to 228 kcal for the whole tin.
Campbell’s Cream of Chicken Condensed Soup is a different format from the ready-to-heat tomato tins.
M&S has a 400g Cream of Tomato Soup tin and a separate Tomato Soup in a Cup format.
This powdered chicken cup soup is an alternative to packing a tin when you have a suitable cup and can obtain boiling water for preparation.
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Consider this cup-soup format if you can obtain boiling water and have a suitable cup during your journey. The pack is labelled 4 x 17g; check its preparation directions, per-cup nutrition and allergen declaration before packing it.
Yes. National Rail says passengers are welcome to bring their own food. Plan how you will prepare and eat the soup, because catering availability varies by train company.
Use the container specified in the product’s instructions, not the can. Tesco instructs customers to empty its Low Fat Tomato Soup into a non-metallic bowl and cover it for microwave heating.
Of the two low-calorie tins compared here, Asda lists Weight Watchers from Heinz Tomato Soup at 76 kcal per 295g can; Tesco lists its Low Fat Tomato Soup at 61 kcal per half of a 400g can, or 122 kcal for the whole tin. Check the label of the pack you buy.
No. Asda lists 76 kcal alongside 1.7g salt per can for Weight Watchers from Heinz Tomato Soup. Compare both figures for the amount you intend to eat.
No. Vegetarian suitability and milk-free suitability are different checks. Read the allergen declaration on the exact tin if milk is a concern.