- UK stocks opened lower on Wednesday as trade tensions simmered ahead of a meeting between President Donald Trump and European Commission President Jean-Claude Juncker.

At 0857, the benchmark FTSE 100 index was down 20.23 points, or 0.3%, at 7.688.82.

Pharmaceutical company Indivior slumped 19% as it warned the impact from the launch of a generic version of its opioid addiction treatment 'could be materially higher' in 2018 after first-half net profit slipped 6%.

Tullow Oil gained 2.5% after it returned to the black and upgraded its annual production guidance, helping it to make headway reducing its debt pile and contemplate reinstating dividends.

Among large caps, Vodafone Group said revenue fell 4.9% in the first quarter but the telecom stuck to its annual earnings guidance. The shares were broadly unchanged.

Television broadcaster ITV booked a 7% fall first-half adjusted profit, weighed down by higher costs, while announcing it would launch a new streaming service. Its shares fell 0.5%.

Antofagasta shed 1.3% after the Chilean-focused miner reported an 8.5% on-year fall in first-half copper production due to lower grades.

Fellow miner Fresnillo fell 2.1% after it downgraded its annual production guidance for silver.

Plastics supplier Victrex gained 1.9% as its third-quarter revenue rose 10% and the company said it remained comfortable with its full-year expectations.

Chemical company Croda International weakened by 2.6% after it a strong pound limited growth in first-half profits to just 1.7%.

Low-cost airline Wizz Air descended 3% after strikes by air-traffic controllers sparked a 14% fall in first-quarter profit.

Primary Health Properties upped its interim divided by 7% as increased rental income helped it boost underlying earnings. Its shares were flat.

Wealth manager Rathbone Brothers booked a 64% jump in first-half profit, largely owing to one-off times. Funds under management grew 2% and the company's shares weakened by 1%.

Ultrasound software and simulation company MedaPhor Group gained 3.7%, despite posting a deeper first-half loss, driven by higher costs that offset rising revenue.

Story provided by