Oct 4 (Reuters) - British insurer Phoenix Group said on Wednesday Nicholas Lyons will return as chair of the board in December, after he stepped down last year to take up the full-time role of Lord Mayor of the City of London for a one-year term.

As a result, Alastair Barbour will step down from the role of interim chair, Phoenix said.

(Reporting by Eva Mathews in Bengaluru; Editing by Janane Venkatraman)