In 1961, he returned to the United Kingdom, where his family had been in the profession for three generations, initially as Beare, Goodwin & Co. from 1892, then incorporated as
J & A Beare in 1954. During his time at the head of the family's business, he became an authority on authenticating and identifying violins as well as being one of the only tradesman entrusted to repair and maintain instruments by such artists as
Yehudi Menuhin,
Yo-Yo Ma,
Nathan Milstein,
Jacqueline du Pré,
Mstislav Rostropovich,
Isaac Stern,
Pinchas Zukerman; Beginning in 1966, when his friend Paul Rosenbaum died, he began researching the lives of Venetian makers, a project Rosenbaum had begun. Beare kept researching for life without publishing it. and gave its old name to a new venture formed jointly with another London-based firm. Beare was a director of both companies but resigned as a director of J & A Beare in November 2012, and from his subsequent role as consultant in September 2013. In 2002
CNN characterized him as the "world's most respected violin dealer". ==Personal life and death==