- UK stocks opened a tad lower on Tuesday, ending a two-day rally inspired by Boris Johnson's election win and progress on US-China trade talks.

A disappointing trading update from consumer goods giant Unilever weighed on sentiment.

At 0849, the benchmark FTSE 100 index was down 5.39 points, or less than 0.1%, at 7.513.66.

Unilever, the maker of Flora margarine, Lipton tea and Dove soap, dropped 5.3% to £43.87 as it warned of underlying sales growth in 2019 'slightly below' its previous guidance of 'the lower half' of its 3-5% multi-year range.

For the coming financial year, Unilever also warned of full-year underlying sales growth in the lower half of its multi-year range.

Distribution and services group Bunzl fell 1.9% to £20.61 on forecasting revenue growth in a range of 2% to 3% for the full year, citing 'mixed' macroeconomic and market conditions.

Train and bus ticket distributor Trainline shed 2.2% to 499p, even as it reported 26% growth in revenue in the first nine months of its financial year, while sticking to its annual guidance.

The company also warned, however, that it expected ticket sales to be impacted by worker strikes in France.

Healthcare services provider UDG Healthcare dropped 2.5% to 779p on news that chairman Peter Gray was standing down in September 2020.

Oil services group Petrofrac slipped 4.8% to 381.9p after it reported experiencing further tendering delays in its engineering and construction business, which weighed on its order book.

UK meat producer Cranswick shed 1.2% to £32.82, having announced that it had acquired pig farming group Packington Pork from the Mercer family, for an undisclosed sum.

Quality assurance provider Intertek firmed 1.7% to £57.86 as it acquired hospitality industry services provider Check Safety First, also for an undisclosed sum.

Specialist engineer Pressure Technologies rose 4.3% to 109p, having narrowed its annual losses after its sales grew by about a third.

Petra Diamonds added 2.0% to 8.5p as it appointed Peter Hill as its new chairman, to succeed founder Adonis Pouroulis when he stands down from the role at the end of March.

Hill was currently chairman of both geotechnical contractor Keller and building products company Volution.

Infection prevention product manufacturer Tristel gained 4.8% to 364p on announcing that it expected to post a rise in first-half profit, buoyed by a positive contribution from recently-acquired operations in Europe.

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