Hennings ran a New Zealand wine promotion, including tutored tastings, mail-outs, regional press coverage and window displays, for 10 weeks - and saw average bottle spend on Kiwi wines rise from £8.52 to £8.91.
Owner Matthew Hennings said: "Winning this prestigious award is a real testament to the quality of our retail staff and the promotions we featured during the period. I have always felt
had potential to succeed in a competitive environment and am thrilled with this
achievement. It is not difficult to get behind such a wonderful wine-producing country as New Zealand, with such a wealth of quality and diversity to sell ."
He has won a buying trip for two to New Zealand.
Six other finalists were treated to a dinner at London's Bleeding Heart Restaurant - The Champagne & Wine Cellar, Connolly's Wine Merchants, James Nicholson Wine Merchants, Lancelot Wines, Lewis & Cooper and The Wright Wine Company.
NZW director Warren Adamson said: "We were bowled over by this year's entries, which were the best yet, and it was so difficult to choose just one entry. Hennings Wine Merchants were great all-rounders in the campaign and left no stone unturned when promoting New Zealand wine in their stores."
The 2008 competition will be launched at the Specialist Importers Trade Tastings in February.