Decanter.com reports that house brand wine sales are rising in Great Britain even as the overall market slumps.

Retailers are reporting impressive growth of own-label wines as cash-strapped customers look to rein in their spending.

A Datamonitor survey reports 41% of all grocery sales in the UK are now own-label, up from 38.2% in 2008, and wine sales are following the upward trend.

Supermarket retailer Sainsbury’s told decanter.com its own-label wines had grown at double the rate of its wine range this year. A spokeswoman said: ‘Last year we revamped our own-label packaging and we have put a lot of effort behind the range in store and in the media.’

House brands aren’t so important in the U.S. wine market [yet] but they may well be in the future. The best known U.S. house brand wines are Charles Shaw (a.k.a. Two Buck Chuck) at Trader Joe’s and Kirkland Signature at Costco. Big Box retailers Target and Wal-Mart have launched their own house brands in recent months and other retailer’s have commissioned discount brands (not yet closely associated with their names) in an attempt to get a grip on the trading-down market. Look for this trend to continue, especially if the economic downturn persists.

Chateau Cash Flow

House brands are a solution to several problems, which is why they are likely to increase in importance. On the consumer side, they provide buyers with reputational assurances. You might wonder if a $3 wine can be any good, but you are more likely to try it if Trader Joe’s or Wal-Mart stands behind it. As I have written before, a $3 unknown wine at Safeway makes you think “how can it be any good?” while a $3 wine with the Trader Joe’s imprimatur makes you think “how bad can it be?” You might buy the latter but not the former.

The British have years of experience with house brands — it is why they are [for now] the world’s most important wine market and why Britain’s supermarkets are arguably the most sophisticated wine distribution machines on earth. The U.S. is catching up, but Britain still leads.

Reputation is especially important when consumers are trading down, moving into unfamiliar territory on the lower shelves. Decanter reports that while some British consumers are trading down to house brands, building that market, existing customers are trading up within the house brand portfolio! If this trend continues it will be hard to resist the house brand strategy.

Supply Side Wine

House brands have big advantages on the supply-side, too. Producers with surplus wine are often happy to sell it off through house brand bopttlings because it generates cash flow without directly undercutting their own brands and market. In my international economics class we call this “dumping.” You sell off unintended surpluses (of which there are plenty just now) through retailers in a different market segment, allowing you to maintain reputation and price points in the home market. If you start discounting wine to sell it, we have learned, it is sometimes difficult to regain the ground you have lost.

Some British retailers have moved aggressively into the supply chain, buying up grapes and surplus wines and acting as full-fledged negociants, but it isn’t really necessary to make such a large commitment to get into the house brand wine business. There are plenty of regional and national firms who can quickly respond to demand. No large investment is required, cost is low.

House brands can also have a somewhat fluid identity (not tied tightly to a particular region or style), which allows them to benefit from global opportunities, sourcing Sauvignon Blanc from Chile, for example, and Pinot Noir from Northern Italy or the South of France.

The main problem is to be sure that quality is good enough. Otherwise you have put your own brand in jeopardy.

Three Way Battle

The world’s wine markets are a battleground for three models of wine sales. The German model is based upon low cost (one euro per liter) and hard discount sellers like Aldi. The American model is all about corporate brands like Gallo and Constellation Brands. The British model is built upon upscale supermarkets and the house brands they sell.

Recent news suggests that the British model is gaining ground, both in the UK and here in America, where it is the model that drives Costco sales (Trader Joe, on the other hand, uses a version of the German system). It will be interesting to see if this trend persists once the recession eases up.