- UK stocks opened lower on Tuesday as key Brexit negotiations remained at an impasse and tensions continued to simmer between the West and Saudi Arabia.

At 0849, the benchmark FTSE 100 was down 10.65 points, or 0.2%, at 7.018.57.

British American Tobacco fell 0.8% after it lowered its full-year revenue guidance amid a weaker performance in Japan and a product recall in the US.

Theme park operator Merlin Entertainments slumped 8.1% after it said it had grown revenue 2.6% in the year to date but warned the cost environment remained 'challenging'.

Defence contractor Meggitt rallied 5.6% as it upgraded its annual revenue guidance on the back of higher-than-expected demand in the third quarter.

Mining group Rio Tinto booked a 3% fall in third-quarter iron ore production after a fatality at a mine in Australia held up operations. Its shares fell 0.5%.

Ecudoar-focused miner SolGold jumped 17% after large rival BHP Billiton paid £45m to raise its stake in the company to 11.2%. BHP shares fell 0.8%.

Anglo American shed 1.2% after the value of its diamond sales fell.

Bellway Homes gained 1.0% as it booked a 14% rise in annual profit, though the company warned that Brexit could weigh on the busy spring selling season.

AstraZeneca gained 0.6% after it and partner Merck were granted an orphan drug designation by the FDA for their pancreatic cancer treatment.

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