CHATTANOOGA, Tenn.--(BUSINESS WIRE)--Unum today announced the acquisition of National Dental Plan, a leading provider in the U.K. of dental insurance through the workplace. This adds a valuable offering to the Unum UK portfolio of employee benefits products and services. “Dental insurance is a fast-growing market in the U.K. and a natural fit with our existing portfolio as Unum looks to grow its employee benefits footprint,” said Unum UK CEO Peter O’Donnell. “Together we will leverage our respe