BUZZ — UK'S Big Yellow gains after activist Ancora urges strategic review, including potential sale

* British self-storage company Big Yellow Group rises 3.9% to 830.5p, highest one-day gain since 24 June * Activist investor Ancora, which owns more than 4% of the company, has urged Big Yellow to pursue a strategic review, including a potential sale * Ancora estimates the stock trades at an "unwarranted" discount to net asset value and values it at £12.36 ($16.40) per share * Ancora said Blackstone had offered 50% above the current share price and that soliciting interest now could yield a higher offer * As of last close, BYG was down 23.6% YTD ($1 = 0.7539 pounds) (Reporting by Amna Mariyam in Bengaluru) ((amna.mariyam@thomsonreuters.com; +91 8448625620)