Swiss chocolate maker Lindt & Sprüngli has reported a 17.2% increase in half-year sales to CHF983.4m (£421.9m).

The company also said that net profit during the period rose from CHF3.9m (£1.7m) last year to CHF9.9m (£4.2m) this year.

It added that despite the impact of the hot summer in Europe and the US, it expects its full-year sales to increase by 10-12%.