Who is choosing tuna for a picnic?

Sandwich and wrap makers

If you will assemble the filling with limited preparation space, look for a pack explicitly labelled drained, ready to use or no-drain. Princes describes its drained tuna as ready to use, while the John West No Drain Fridge Pot product is described as ready to eat.

Shoppers making a salad with visible tuna

Steak or fillet labelling helps you look for a larger-piece presentation rather than chunks to mix throughout a salad. It still describes preserved tuna, not a fresh fish fillet.

Shoppers checking ingredients and suitability

Compare the exact pack’s ingredients, salt information and fish-allergen declaration. If pregnancy guidance applies, the NHS also sets a weekly limit for tuna; the packing medium does not replace that check.

What should you check before buying?

Start with the fish format your lunch calls for, then check how the pack will be opened, used and stored.

Priority What to check Your needs
Fish format Check whether the label says steak, fillet or chunks. If the recipe requires fresh tuna, use the fresh-fish section rather than a tin or preserved jar. I want visible pieces over a salad, so I would look at steak- or fillet-labelled tuna. For a thoroughly mixed filling, chunks may suit the plan.
Draining Look for explicit drained, ready-to-use or no-drain wording. Check the pack rather than assuming every steak or fillet has the same preparation instructions. With little room to prepare sandwiches, I would prefer a format that does not require me to drain liquid.
Packing medium Read the ingredients for spring water, brine or oil, then compare the exact nutrition panel per 100g on the basis stated there. Princes lists 0.9g salt per 100g drained for its Tuna Steaks in Brine. For my picnic recipe, I would choose the medium I want in the finished filling and check the label if salt matters to me.
Opened-pack storage Follow the product’s instructions for transferring, covering and refrigerating unused tuna. The Sainsbury’s Tuna Steak in Spring Water page says to use it within 1 day after opening; the cited John West fridge pot and M&S tuna steak pages specify up to 2 days for their products. If I prepare the filling ahead of time or expect leftovers, I need to follow the instructions on the pack I actually buy.
Allergens and tuna guidance Check the fish-allergen declaration on the tuna and the labels of other filling ingredients. For pregnancy, the NHS advises no more than 4 cans of tuna or 2 tuna steaks a week. I need to account for everyone eating the lunch, including any fish allergy or applicable pregnancy guidance.

What can catch you out?

  • Reading “tuna steak” as fresh fish

    A canned steak can provide distinct pieces, but it will not fulfil a recipe that calls for fresh tuna. M&S lists its canned tuna steak in its food-cupboard range and fresh tuna separately.

    Decide whether you need preserved, ready-to-eat tuna for a filling or fresh fish requiring separate preparation before choosing a product.

  • Assuming every tuna steak has the same ingredients

    Steak-labelled products are packed in different media, including spring water and brine. Their ingredients and nutrition information must be compared product by product.

    Check the packing medium and the exact pack’s nutrition panel, particularly its salt value and whether figures refer to drained tuna.

  • Using another pack’s storage instructions

    After-opening instructions differ: Sainsbury’s specifies use within 1 day for its cited spring-water steak, while the cited John West fridge pot and M&S steak products specify up to 2 days under refrigeration.

    Read your pack before preparing food ahead, and transfer and refrigerate unused tuna as its label directs.

  • Counting tuna as the oily-fish portion

    The NHS says fresh and canned tuna do not count as oily fish. Its pregnancy advice also sets a weekly tuna limit because tuna can contain mercury.

    Do not count a tuna picnic lunch as an oily-fish portion. If pregnant, follow the NHS advice of no more than 4 cans of tuna or 2 tuna steaks a week.

Brands and own-label examples

These references describe particular products or ranges; check the label of the item you choose.

John West

The No Drain Fridge Pot Tuna Steak with a Little Brine is an example for shoppers who want a resealable pack for a picnic filling.

  • Sainsbury’s describes this product as ready to eat, with an easy-peel foil lid and resealable pots.
  • Its product information warns that some bones may remain and says to refrigerate the pot for up to 2 days after opening.

Princes

Princes offers tuna steak and drained-tuna formats relevant to different picnic preparations.

  • Princes describes its drained tuna as ready to use. Its Tuna Steaks in Brine contain tuna, water and salt.
  • The brine steak lists 0.9g salt per 100g drained; compare the exact product label if salt is a consideration.

Tesco

Tesco’s tinned-tuna range is a reference for comparing formats rather than treating all tuna as interchangeable.

  • Its category distinguishes tuna steaks, drained tuna and products packed in oil, spring water or brine, and lists tuna fillets in olive oil.
  • Check the individual product page and pack to distinguish a fillet from a steak or chunk product.

Sainsbury’s

Sainsbury’s Tuna Steak in Spring Water is an own-label example of preserved steak-labelled tuna.

  • The product page describes skipjack tuna in spring water and says it is pole-and-line caught and from an MSC-certified fishery.
  • For this product, the page instructs shoppers to transfer unused contents to a non-metallic container, refrigerate and use within 1 day.

M&S

M&S lists canned Tuna Steak in Spring Water separately from the fresh tuna in its fish range.

  • The canned product lists skipjack tuna and spring water as ingredients, making its preserved format clear.
  • Its instructions say to put unused contents in a non-metallic container, refrigerate and eat within 2 days.

Joybuy tuna options

These options cover preserved tuna chunks for mixed fillings and steak- or fillet-labelled products for shoppers considering more visible pieces. The fillets in a jar are preserved tuna, not fresh fish.

John West No Drain Tuna Chunks in Springwater 3 x 100g

John West No Drain Tuna Chunks in Springwater 3 x 100g

The no-drain chunk format suits a tuna filling that will be mixed into sandwiches or salad. Choose a steak- or fillet-labelled product instead if visible larger pieces are central to your plan.

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Morrisons Drained Tuna Steaks with Sunflower Oil 110g

Morrisons Drained Tuna Steaks with Sunflower Oil 110g

This steak-labelled option is packed with sunflower oil for a salad or sandwich filling. If avoiding draining is important, check the pack’s preparation wording: the supplied product descriptions differ from its “Drained” title.

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Rio Mare Tuna Fillets in Olive Oil Glass Jar 180g

Rio Mare Tuna Fillets in Olive Oil Glass Jar 180g

Consider these olive-oil-packed fillets when you want fillet-labelled tuna for a salad or sandwich. The jar contains preserved tuna, not fresh fish; check its label for draining and after-opening instructions.

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Morrisons Fad Free Tuna Chunks in Brine 145g, 6 packs

Morrisons Fad Free Tuna Chunks in Brine 145g (6 Packs)

Chunks in brine suit tuna that will be mixed into a sandwich or salad filling rather than displayed as larger pieces. Check the pack’s draining directions when planning where to assemble lunch.

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Morrisons Fad Free Tuna Chunks in Spring Water 145g

Morrisons Fad Free Tuna Chunks in Spring Water 145g

This spring-water chunk format suits a mixed salad or sandwich filling, rather than a steak- or fillet-style presentation. Check the pack if draining convenience affects your picnic preparation.

View on Joybuy

Picnic tuna questions

Is tinned tuna steak the same as fresh tuna fillet?

No. Steak and fillet can describe the pieces in a preserved tuna product; they do not make it fresh fish. M&S lists canned tuna steak in its food-cupboard range and fresh tuna separately, so use the fresh-fish section if your recipe requires fresh tuna.

Which tuna format makes picnic sandwiches easier to assemble?

If reducing draining and preparation mess matters, look for a product explicitly described as drained, ready to use or no-drain. Princes describes its drained tuna as ready to use; chunks suit a thoroughly mixed filling, while steak or fillet labelling is more relevant when you want visible pieces.

What should I do with tuna left after opening the pack?

Follow that product’s transfer, refrigeration and use-by-opening instructions. The cited Sainsbury’s spring-water steak says to refrigerate unused tuna and use it within 1 day, while the cited M&S steak and John West fridge pot pages specify up to 2 days for their respective products.

What does the NHS say about tuna during pregnancy?

The NHS advises pregnant people to have no more than 4 cans of tuna or 2 tuna steaks a week because tuna can contain mercury. That limit concerns tuna intake across the week, not just the portion packed for one picnic.

Which allergen labels should I check for a tuna filling?

Check the exact tuna pack for its fish-allergen declaration, then check any other ingredients you add, such as bread, mayonnaise or crackers, against the needs of the people eating the lunch.