StockMarketWire.com - UK stocks opened lower on Tuesday as local investors grappled with the potential for national elections, as Boris Johnson faces resistance to his Brexit plans in parliament.

At 0900, the benchmark FTSE 100 index was down 11.33 points, or 0.2%, at 7.270.61.

Plumbing and heating products group Ferguson gained 2.3% to 6,282p after it announced a plan to demerge its UK operation and the departure of chief executive John Martin.

Inkjet printing technology company Xaar tumbled 25% to 62.66p on announcing that it would write down the value of its assets and delay the release of its first-half results.

Xaar also warned of a weaker-than-expected performance over the remainder of the year.

Packaging company DS Smith fell 1.8% to 335.6p as it acknowledged that sales volumes were being impacted by economic uncertainty.

Wagamama and Garkfunkels owner Restaurant Group fell 9.1% to 140.1p, having swung to a first-half loss, despite improving sales, after it took a large impairment charge on the value of its assets.

Healthcare-company investor Syncona rose 1.7% to 233.5p on news that it had injected another £48m into retinal gene therapy group Gyroscope Therapeutic.

Flooring retailer Victoria advanced 5.4% to 406p as it announced that its like-for-like revenue, margins and earnings were all tracking 'well ahead' in the current financial year.

Brick and paver maker Michelmersh Brick rallied 5.8% to 92.04p, as it posted a rise in first-half profit and said it expected to exceed market expectations for the full-year.

Computer, power and communications products manufacturer Solid State gained 12% to 480.75p as it guided for profits for the full year to be 'significantly ahead' of market expectations.

Trinidad and Indonesia focused Range Resources more than tripled to 0.62p after it agreed to sell assets in Trinidad to LandOcean in exchange for offsetting all outstanding debt owed to the company plus $2.5m in cash.

Cake decorations and food ingredients supplier Real Good Food fell 1.7% to 6.88p after it announced that said chief executive Hugh Cawley would stand down from the role with immediate effect, and leave the company at the end of September.

Scottish broadcaster STV added 1.4% to 360p after it swung to a first-half profit, as improving margins buffered the company from falling revenues.

Structural steel specialist Severfield gained 3.2% to 64p, on announcing it was trading in line with expectations, said it still expected its annual results to be significantly weighted to the second half. Story provided by StockMarketWire.com