Robinsons squash and Tango maker Britvic said sales fell slightly by 0.4% to £304.3 million in the 12 weeks to December 21, driven by a marginal volume decline of 0.3%.

The Hemel Hempstead-based firm, which exports to over 50 countries, said UK sales fell 1.4% in "a particularly competitive promotional environment", but still said it expects to meet its annual earnings estimates of £164 million to £173 million.