Global Brands, the AIM listed company which owns the Domino's Pizza franchise in Switzerland, Luxembourg and Liechtenstein, saw sales in the first half of 2011 rise by 15.4% from the same period last year.However, the half-year revenue rise to 7.7m Swiss Francs (CHF) masked a disappointing second quarter.Exceptionally hot weather in Switzerland between April and June slowed down the rise in sales, with the stores owned wholly by Global Brands (as opposed to sub-franchisees) seeing like-for-like sales in the second quarter just 1.7% better than 2010.The Chief Executive, Bruce Vandenberg, said of the trading update:"While the second quarter sales performance was a little disappointing, we believe that this was primarily due to unseasonal weather conditions and the business remains capable of significant growth."Investors took a different view to Vandenberg, with the company's shares trading down 9% at 2.5p in morning trading.BS