Complex sentence: Shortly afterwards, George Bernard Shaw launched an ultimately successful petition to have the ashes of both reburied in Westminster Abbey, and they are now in the nave of the Abbey, close to those of their fellow-socialists Clement Attlee and Ernest Bevin.
Split into simpler sentences: Shortly afterwards, George Bernard Shaw launched an ultimately successful petition to have both reburied to Westminster Abbey. Today, the Webbs' ashes are interred in the nave of Westminster Abbey, close to those of Clement Attlee and Ernest Bevin.