What Is Cask Ale? The Complete Guide

If you've sat in a pub in Yorkshire and heard someone order "a pint of real ale," you've heard cask ale in action. It's one of Britain's great brewing traditions, and it's having something of a renaissance as drinkers rediscover what a properly kept pint can taste like. This guide answers the questions we get asked most at Saltaire Brewery, from what cask ale actually is to how our own cask range is brewed in Shipley.

What is cask ale?

Cask ale, often called "real ale," is beer that's still alive when it leaves the brewery. Unlike most keg or bottled beer, it isn't filtered, pasteurised or artificially carbonated. Instead, it's put into the cask while a small amount of yeast and sugar remain active, so fermentation continues naturally inside the container. This produces the beer's carbonation and rounds out its flavour, right up until the moment it's poured.

As it's a living product, cask ale needs careful handling. A skilled cellar person will "condition" the cask, vent it, let it settle, and serve it within a few days of tapping. Done well, the result is a soft, full-flavoured pint with a character that's genuinely different from anything that comes out of a keg.

Cask ale vs keg: what's the difference?

This is the question we hear most often, and it comes down to three things: carbonation, conditioning and shelf life.

• Carbonation: Cask ale carbonates itself naturally through secondary fermentation. Keg beer is force-carbonated with CO2 or a mixed-gas blend at the brewery, giving it a fizzier, more consistent finish.
• Conditioning: Cask ale keeps maturing after it leaves the brewery, developing flavour right up until it's served. Keg beer is filtered and pasteurised before packaging, so its flavour is locked in and won't change in the cellar.
• Shelf life and dispense: Cask ale is typically served through a hand pump, and should be drunk within two to three days of the cask being tapped. Keg beer, pushed to the tap under gas pressure, is more stable and lasts considerably longer once connected.

Neither format is "better" in every situation. Keg suits consistency and longer runs; cask rewards a pub that knows how to look after it, with a texture and depth many drinkers prefer.

Real ale in Yorkshire

Yorkshire has one of the strongest real ale cultures anywhere in the UK. From the stone-flagged pubs of the Dales to the taprooms of Leeds and Bradford, cask beer has never gone out of fashion here, and the county is home to a dense cluster of independent breweries producing it. Saltaire Brewery sits right in the middle of that tradition, brewed in Shipley since 2006 and named after Saltaire - a UNESCO World Heritage village on the edge of the Yorkshire Dales. Cask has been part of our range from day one, and it remains close to the heart of what we do.

How is cask ale made?

The brewing process starts the same way as any other beer: malted barley is mashed, boiled with hops, and fermented with yeast. The difference happens at packaging. Rather than filtering and force-carbonating the finished beer, we transfer it into the cask while fermentation is still finishing off, along with finings (which help the beer clear naturally) and, for some of our beers, extra hops for dry-hop aroma.

Once at the pub, the cask is stillaged in the cellar and allowed to settle. Cellar staff then vent it to release excess pressure and let it "drop bright," a process that usually takes around 24 hours. From there, it's ready to be pulled through a hand pump or poured by gravity, ideally at a cellar temperature of around 11-13°C, cool but never fridge-cold.

How should cask ale be served?

Good cask ale depends as much on the cellar as it does on the brewery. A well-kept pint should be served at cellar temperature, with a decent head to carry the aroma, and sold within a few days of the cask being tapped. Serve it too cold and you lose the flavour, leave it too long once it's open and it will start to fade. It's a bit more demanding than keg, but that extra care is exactly why a well-kept pint of cask ale tastes the way it does.

Best cask ales: Saltaire's cask range

Our cask range is built around the beers we think show real ale at its best, all brewed at our Shipley site in West Yorkshire:

• Saltaire Blonde (4%) - our best-selling golden ale, light, crisp and easy-drinking.
• Titus Yorkshire Bitter (3.9%) - a traditional session bitter with classic British malt character.
• South Island Pale Ale (3.4%) - a lower-strength pale packed with New Zealand hop character.
• Citra Pale Ale (4.2%) - built around the Citra hop, fruity and full of aroma.
• Cascade American Pale Ale (4.8%) - punchy grapefruit and citrus bitterness from American Cascade hops.
• Triple Chocolate Stout (4.8%) - a rich, dark stout with layered chocolate character.