Butler, Snow, O’Mara, Stevens & Cannada launched a London office on Tuesday focusing on cross-border tax work for private clients.

Leading the office is Brad Westerfield, who joined Butler Snow from London’s Withers earlier this month. Also practicing from London is Kurt Rademacher, who rejoined Butler Snow three years ago after leaving the firm to work at Withers. The two attorneys’ practices “overlapped” at Withers, Rademacher said.

Three attorneys will work full time from the London office, the firm’s only international branch.

With its largest location in Ridgeland, Miss., Butler Snow has 240 lawyers and grew by 35 percent during 2012, according to the NLJ 350, The National Law Journal’s annual survey of the nation’s largest law firms.

A big part of the firm’s expansion was the addition of 37 Nashville, Tenn., lawyers from rival firm Miller & Martin. Butler Snow has 14 offices total, including four in Mississippi and two each in Alabama, Louisiana, Pennsylvania and Tennessee.

Barry Cannada, head of Butler Snow’s business services group, said the London client-base will be “heavily weighted” with high-net individuals, businesses and their advisers.

“The strategy in opening the office is to provide better service to existing clients both in Europe and Asia,” Cannada said.

Contact Leigh Jones at ljones@alm.com.