At the ceremony Steve Rosenberg, the corporation s Russia Editor, performed a moving piano piece, which has been shared on social media to images and clips of the late broadcaster.
Proving life away from 24-hour news suits them were former BBC News anchors Dr Sian Williams, now a qualified Chartered NHS psychologist, and Natasha Kaplinsky, who works as a more general presenter.
BBC stars arrive at George Alagiah s memorial service after journalist s tragic death ok.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ok.co.uk Daily Mail and Mail on Sunday newspapers.
Presenters including Mishal Husain, Mark Austin, Fiona Bruce and Sophie Raworth were in attendance for the service at St Martin-in-the-Fields church in Trafalgar Square.
Natasha Kaplinsky made a rare appearance in public on Tuesday as she attended the memorial for her fellow News At Six presenter George Alagiah in London.