It's something worth considering, but should you find yourself in an ACTUAL emergency survival situation, then it's highly unlikely that you will have your favourite knife with you when you need it the most. It's a sad fact that many of us spend our time practising bushcraft in our favourite woodland with our favourite knives but will unfortunately come undone when the SHTF.

If you are someone that carries a legal carry knife daily, then you stand some chance of survival when the situation calls for it. BUT WHAT IF you don't have one at that critical moment? What will you do? This is where your ingenuity shines. You will need to be a little creative and build yourself an improvised survival knife.

Improvised survival knives are makeshift cutting tools created from readily available materials like scrap metal, glass, stone or any other material that you happen to find about you. When regular gear is unavailable, items like copper-nickel coins, saw blades, or discarded metal fragments can be cold-hammered or ground into effective, reusable cutting edges. [1, 2, 3, 4, 5, 6]

 

Key Materials and Sourcing

• Scrap Metal: Old files, high-carbon saw blades, discarded lawnmower blades, and even copper coins can be ground or cold-hammered into durable, sharp edges. [1, 2]
• Glass and Hard Plastics: Large, curved shards of broken glass (like from a bottle) can be "knapped" or pressure-flaked to create razor-sharp edges ideal for fine cutting. [1, 2]
• Bone and Antler: Dense animal bone can be split and shaped on rough stones into durable, piercing tools or small knife points. [1, 2, 3]

 

 

Construction and Shaping

• Grinding & Sharpening: Rubbing the material against a coarse natural abrasive rock (such as granite or sandstone) will help you establish a bevel and a symmetrical cutting edge. [1, 2, 3]
• Handle Creation: The fragile or sharp spine of your improvised blade must be protected. Sandwich the blade between two halves of a split wooden stick, secure it using bark or vines, and tightly wrap it using paracord, shoelaces, or twisted natural fibres. [1, 2, 3, 4]

 

Safety and UK Legal Context

If you are practising improvised knife-making in a wilderness environment, it is important to be aware of UK bladed-article laws. Under UK law, carrying any knife in public without a "good reason" is generally illegal, with exceptions strictly made only for folding pocket knives with blades under 3 inches. If you are camping or bushcrafting, you must be able to justify carrying your tools for legitimate use. [1]