Luxury fashion company Burberry has revealed a better-than-expected revenue increase of 13 per cent for the six months to September 30, but warned the outlook remains uncertain.

Like-for-likes in retail rose 3.4 per cent, with total retail revenue climbing 14 per cent.

Operating profit is expected to be in line with market estimates.

Spain, however, proved a challenging market, with total sales down 20 per cent. The company blamed low consumer confidence and a poor economic environment.

The Americas remained the best-performing region, while Europe (excluding Spain) and Asia all showed growth in comparable store sales.

Burberry's wholesale revenues increased 15 per cent, while licensing revenue was down 3 per cent.

Burberry chief executive Angela Ahrendts said: “I am pleased with Burberry’s performance in the first half of the year, against the background of an increasingly challenging external environment.

"The strength of our diversified business model was again demonstrated as we delivered double digit growth for the fifth consecutive six-month period.

“While we expect trading conditions in the all-important third quarter to remain volatile, we continue to focus on our proven product, regional and channel strategies to drive long-term growth.”