Adding Concise Background: 
Atria, a major player in the food industry, has been eyeing expansion opportunities in Russia due to the growing demand for its products in the region.

Sentiment Highlighting:
The substantial investment made by Atria in the Gorelovo plant signals confidence in the potential for growth in the St Petersburg area, reflecting positively on the company's future prospects.

Synthesizing Enhanced Sentence:
Atria's EURO 70mn investment in expanding the Gorelovo plant to about 22,000 sq m is set to double Atria Russia's production capacity in the St Petersburg area, reflecting the company's bullish outlook on the region's market potential.