There is a particular kind of misery that comes from sitting on a damp tussock at 600 metres in February, eating a sandwich that has frozen solid and drinking water so cold it makes your teeth ache. It is entirely avoidable. With a bit of thought at the kitchen table the night before, a bleak lunch stop becomes the highlight of the day — a proper pause that resets your legs, your temperature and your mood for the second half of the walk.

Why the Lunch Stop Matters More in Winter

On a short summer ramble you can get away with a squashed sandwich and a bottle of water. Cold days are different. When you stop moving, your body stops generating the heat that was keeping you comfortable, and your core temperature starts to drop within minutes. Add a wind blowing across a ridge and a damp base layer, and fifteen minutes of standing about can leave you shivering and stiff.

A hot drink and a decent lunch do three things at once: they put fuel in, they warm you from the inside, and they give you a reason to sit still long enough to actually rest. That psychological lift is real. A flask of soup in the middle of a long moorland trudge feels like a small luxury, and it will carry you through the last few miles far better than a cereal bar eaten while walking.

Choosing and Using a Flask

If you only buy one piece of winter kit this year, make it a wide-mouthed vacuum flask. The narrow-necked ones are fine for tea but a nuisance to fill with soup and a genuine pain to clean — and a flask that still smells of last month's lentil soup is a flask you will stop using.

• Wide mouth, 500–750ml. Enough for two mugs, or one generous portion of soup plus a shared swig of tea.
• Preheat it properly. Fill with boiling water, screw the lid on, and leave it for five minutes while you make your sandwiches. Tip the water out, then fill with whatever you are actually drinking. This single step can add well over an hour of usable heat.
• Fill to within a couple of centimetres of the neck. Air space is the enemy; the less of it there is, the longer the contents stay hot.
• Check the seal before it goes in the bag. A flask that leaks over a spare fleece is a lesson you only need once.

For soup, heat it to a simmer, then let it cool for a minute or two before pouring — boiling liquid plus a sealed flask can build pressure and sputter when you open it. Chunky soups and stews hold their heat better than thin broths, and they travel without sloshing about as much.

Drinks Worth Carrying

Tea and coffee are the obvious choices, and both work well. Add the milk at home rather than carrying a separate little pot; a few hours in a flask will not do it any harm. If you want something with more staying power, consider:

• Mulled squash or hot blackcurrant. Cheap, warming, and popular with anyone you are walking with.
• Hot chocolate made with milk rather than water. Thicker, richer, and it holds its heat noticeably longer.
• Ginger and lemon tea. Excellent if you have been walking into a cold wind and your throat feels raw.
• A second smaller flask of plain hot water. Useful for topping up drinks, warming cold hands against the metal, or rinsing a muddy dog's paws.

Sandwiches That Survive the Rucksack

The enemy of a good hill sandwich is moisture. Wet fillings soak into the bread, and by lunchtime you are eating something with the texture of a damp sponge. The fix is simple: butter both slices generously, right to the edges, before anything else goes near them. The fat forms a barrier, and it also stops the bread going stale as quickly in cold air.

Fillings that travel well include mature Cheddar with chutney, ham with mustard, cold roast beef with horseradish, smoked mackerel pâté kept in a small tub, and hummus with roasted peppers. Keep tomato slices, cucumber and lettuce for a different day — or carry them separately and assemble at the top, which sounds fussy but takes thirty seconds and is worth it.

Alternatives to sandwiches are often better in the cold. A pork pie, a slice of good quiche, a pasty wrapped in foil, oatcakes with cheese, or a tub of cold roast chicken with coleslaw all eat well with cold hands and no cutlery. Wrap everything in greaseproof paper and then foil or a beeswax wrap — it holds its shape, keeps the crumbs in, and doubles as something to sit on if the ground is wet.

The Small Extras That Make a Difference

• Something sweet and dense. Flapjack, fruit cake, or a handful of dates and nuts. Chocolate is lovely but keep it in an inside pocket, or it will be a frozen brick.
• A sit mat or folded foam square. Weighs almost nothing and stops the cold seeping up through your trousers.
• Gloves you can eat in. Liner gloves or fingerless mitts mean you are not fumbling with a sandwich in bare hands.
• A spare bag for rubbish. Orange peel and apple cores do not belong on the hillside.

When you stop, put your jacket on before you sit down, not after you start shivering. Find shelter — the leeward side of a drystone wall, a boulder, a hollow — and sit facing away from the wind. Twenty minutes is plenty. Then pack up, put your gloves back on, and set off before you get cold again. The first ten minutes will feel brisk; after that, you will be glad you stopped properly.