On a single day out, a heavy pack is a nuisance. On the third afternoon of a long-distance route, it becomes the difference between striding into camp with a grin and shuffling in with your shoulders round your ears. Most multi-day walkers aim for a base weight — everything except food, water and fuel — of around 7 to 9kg. That's comfortably achievable without spending a fortune or sleeping under a bin bag. The trick is to weigh everything once, write it down, and then ask of each item: did I actually use it last time?

The big three: shelter, sleep and carry

Your tent, sleeping system and rucksack make up most of your load, so that's where the real savings live.

• Shelter: a two-skin one-person tent around 1.2–1.5kg is a sensible sweet spot for British weather. Lighter tarps exist, but midges, horizontal rain and Scottish wind make them a specialist choice rather than a general one.
• Sleeping bag or quilt: down rated to roughly 0°C comfort will see you through most of the season at around 700–900g. Keep it dry — a damp down bag loses most of its warmth, and no amount of layering fixes it.
• Mat: don't skip insulation. A 350–450g inflatable with a decent R-value stops the cold ground draining you, and doubles as a sit mat at lunch.
• Rucksack: 50–60 litres for a three-to-five day trip, ideally under 1.5kg. Fit matters more than grams. A pack that carries badly will exhaust you faster than one 300g heavier that sits properly on your hips.

Food: calories per gram, not calories per pound

Food is the biggest variable weight in your pack, and the one people get wrong in both directions. Carry too little and you'll bonk on the climb out of the valley; carry too much and you're hauling lead over every pass. Roughly 600–800g of dry food per day is plenty for most walkers, worth around 2,500–3,000 calories.

Aim for foods around 400–500 calories per 100g:

• Oats, couscous, instant noodles and mashed potato powder for dinners
• Nuts, hard cheese, chorizo, olive oil and peanut butter for density
• Flapjack, chocolate and dried fruit for grazing on the move
• A hot drink sachet or two — tiny, light, and worth a great deal to morale in a wet tent

Repackage everything at home into bags you've measured out. Cardboard, tins and excess packaging are dead weight. If your route passes a village shop or a pub, eat there and carry less for the next stage.

Water and wild swimming

Water weighs a kilogram a litre, so carry only what you need between sources. In the Lake District, Snowdonia and much of the Pennines, streams are plentiful; in the Cairngorms or on eastern moorland, plan refills carefully and never walk past a good source assuming there'll be another.

Treat water from upland streams — a filter or chemical tablets weigh very little and save a lot of worry, particularly below grazing land. For wild swimming, a light pair of swim shorts, a small microfibre towel and a dry bag for your layers add perhaps 300g. That's a bargain for a mid-afternoon dip in a tarn, which loosens tired legs better than any stretch. Choose a spot with a safe entry and exit, check the depth, and never swim alone in cold, moving water. A tow float is worth the weight if you're doing anything more than a quick plunge.

Clothing, layers and staying dry

You can't out-light British weather, so bring a system rather than a wardrobe.

• One set of dry clothes for camp, kept in a dry bag and never worn while walking
• A spare pair of socks — the single best morale item on a wet day
• Waterproof jacket and trousers with taped seams, around 400–600g combined
• A warm mid-layer, usually a light synthetic or down jacket around 300–400g
• Hat, gloves and a buff, even in July

Walking in damp baselayers is fine; sleeping in them is miserable. Rotate: walk in one set, sleep in the other. Air your sleeping bag and mat each morning before packing, and shake out condensation from the tent while you're at it.

Emergency kit you never cut

Lightweight doesn't mean unprepared, especially in hills where weather turns fast and paths vanish into cloud.

• Navigation: paper map and compass, plus a charged phone with offline maps as backup. Batteries die; paper doesn't.
• Shelter: a lightweight group shelter or bivvy bag, around 200–300g
• Light: a headtorch with spare batteries
• First aid: blister plasters, painkillers, tape, antiseptic and your personal medication
• Repair: a few metres of tape, a needle and spare cord
• Communication: tell someone your route and expected check-in times. A personal locator beacon or satellite messenger is worthwhile on genuinely remote routes.

Pack light, walk far, enjoy more

Weigh your kit before your first trip, then weigh it again afterwards. Every item you didn't use is a question, and every item you missed is a lesson. Keep a list on your phone and update it after each outing. The goal isn't the lowest number on a spreadsheet; it's arriving at camp with energy left for a swim, a brew and a look at tomorrow's map. A pack that lets you do that is the right one.