Ask for a navy strength gin at a good bar, and you'll get something bottled at 57% ABV or above, a full 14 percentage points stronger than a typical London Dry. But navy strength isn't just "more alcohol." Done properly, it's a different expression of a gin altogether: more intense botanicals, more texture, and a spirit that holds its character in any drink you put it in.
Here's where the style comes from, what the strength actually does to flavour, and how to get the best out of a bottle.
The gunpowder story
The name comes from the British Royal Navy, and for once, the marketing legend is broadly true. In the 1700s, gin and rum were stored aboard ship alongside the gunpowder. If a barrel leaked and soaked the powder, the crew needed to know their armaments would still fire — and gunpowder doused in spirit will only ignite if that spirit is strong enough.
The test was simple: mix a little spirit with a pinch of gunpowder and try to light it. If it burned, the spirit was at or above what became known as "proof" — around 57% alcohol by volume. If it fizzled, the purser had some explaining to do. Spirits at 57% or higher became known as being at navy strength, and the Royal Navy purchased its gin to that standard for the better part of two centuries.
The term itself is more recent than most people assume. "Navy strength" as a label on gin bottles only appeared in the 1990s, when Plymouth revived the naval specification as a style. Since then, it has become a recognised category in its own right — and a favourite of bartenders, for reasons worth understanding.
What 57% actually does to a gin
Alcohol is the vehicle that carries a gin's botanical oils. At higher strength, the spirit holds more of those aromatic compounds in solution, so a well-made navy strength doesn't just taste stronger — it tastes more: more juniper, more citrus, more spice, with a weightier, almost oily texture on the palate.
That's also why the style is a bartender's tool. In a cocktail, a standard-strength gin can get lost behind vermouth, citrus or tonic. A navy strength keeps its voice. Dilution from ice and mixers brings the drink back to a normal strength, but the botanical intensity survives the journey.
The catch is that strength is unforgiving. At 57%, there's nowhere for a rough spirit to hide — any harshness in the distillation is amplified along with the botanicals. A navy strength gin is, in that sense, the most honest test of a distillery's skill.
How we approach it at The Stillhouse
Our own navy strength, Biggar Strength Gin, is distilled in the same small batches as everything else we make — no more than 140 bottles at a time, on copper pot stills at The Stillhouse in South Lanarkshire. Rather than simply bottling our Original recipe at a higher strength, the recipe is balanced for 57%, so the juniper, citrus and spice arrive with intensity but without aggression.
We're biased, of course. But the judges at the International Wine & Spirits Competition scored it 98/100 — the joint highest score ever awarded to a gin — so we feel reasonably safe saying the approach works. You can read more about that on our awards page, or taste it straight from the source on a distillery tour.
How to drink navy strength gin
The G&T, adjusted. Use less gin than you normally would — 35ml rather than 50ml — with the same amount of good tonic. You'll get a drink at normal strength with remarkable depth of flavour. A sliver of lemon peel suits ours particularly well.
Cocktails that fight back. Navy strength is the natural choice for a Negroni, a Martini, or anything citrus-led like a Gimlet, where a standard gin can fade into the background.
The ready-made route. If you'd rather skip the measuring, our Navy Strength Gin & Tonic in a can is exactly this serve, balanced for you at 8% ABV — bar-quality proportions, just chill and pour.
A note on sipping. Neat navy strength is intense by design. If you want to taste it properly, add a splash of water — it opens the aromatics the same way it does with cask-strength whisky.
Navy strength at a glance
- Minimum strength: 57% ABV (100° proof on the old British scale)
- Origin of the standard: Royal Navy gunpowder-proofing, 18th century
- The name: coined as a modern style label in the 1990s
- Why drink it: greater botanical intensity and a gin that stands up in cocktails
- How to serve: shorter measures, quality mixers, and don't fear a drop of water
Navy strength is gin with the volume turned up — and if the spirit underneath is good, everything gets better at 57%. We'd argue ours proves the point, but the gunpowder test is strictly optional.
Visiting South Lanarkshire? Tour The Stillhouse — every tour finishes with a proper tasting, including something experimental you can't buy anywhere.
