Still in their 20s, this brother-and-sister duo from what The Times of London calls “Britain’s most musical family” serves up virtual Sergei Rachmaninov, Benjamin Britten, and Britten’s teacher Frank Bridge—a program designed not so much to wow listeners at home as to convey poetic impressions. Catch their recital live or time-shift at will, but don’t wait. The window of opportunity closes on July 6 at eight P.M., British Summer Time. —M.G.