Soft drink and mixer maker Fever-Tree has revealed stronger sales for the first half of the year amid a boost from the summer heatwaves in the UK.

Nevertheless, shares in the company slipped in early trading as profitability narrowed in the US.

The London-listed drinks firm revealed that total adjusted revenues grew by 7% to ยฃ184.2 million for the six months to June 30, compared with a year earlier.

Boss and co-founder Tim Warrillow said the performance represented โ€œstrong progressโ€ for the business.

It came as US sales lifted by 7% year-on-year to ยฃ66.9 million as it benefited from increased scale linked to its partnership with Molson Coors.

Meanwhile, European revenues increased by 13%, driven by โ€œgoodโ€ performances in France and Switzerland.

Bosses said it was also โ€œencouragingโ€ that the groupโ€™s UK operation returned to growth for the half-year.

UK sales increased by 3% for the half-year, supported by growth in its off-trade business, which covers products sold in retailers such as supermarkets.

Fever-Tree said UK trading was also buoyed by โ€œfavourableโ€ hot summer weather.

Demand for tonic was flat in the UK, with revenue growth led by a 10% jump in ginger beer sales, amid an increase in demand as both a mixer and a soft drink on its own.

Meanwhile, group pre-tax profits increased to ยฃ14.6 million for the six-month period, compared with ยฃ11.2 million a year earlier.

Mr Warrillow added: โ€œWe have continued to trade well through the summer and are confident in delivering market expectations for the full year.

โ€œOur diversification strategy is expanding the opportunity for the brand, while our increasingly cash-generative business model allows us to invest behind future growth and deliver attractive returns to shareholders.โ€