FTSE 100 down as Tesco and Unilever are hit by price row
Shares in Tesco and Unilever finished down after the two companies became embroiled in a dispute over pricing.
Tesco has stopped selling dozens of Unilever's goods online - including brands such as Marmite and PG Tips.
The row is said to have developed when Unilever - which says it faces higher costs because of the fall in sterling - attempted to increase wholesale prices.
The benchmark FTSE 100 index closed down 46.27 points at 6,977.74. Shares in Rio Tinto fell 4.8% and BHP Billiton slid 4.4% after Citi cut its rating on both of the mining companies to "sell" from "neutral".
But there was better news for housebuilders. Persimmon shares rose 1.9% and Barratt Developments gained 1.9% after the latest survey from the Royal Institution of Chartered Surveyors suggested demand from house buyers had seen a modest recovery.
The pound remained under pressure on the currency markets as worries over the UK's Brexit strategy persisted.