Anna Lapwood and London Bridge security guard Macella came together for an impromptu musical duet on Sunday.Anna, the director of music at Pembroke College, Cambridge, played Lascia ch'io pianga by Handel.It was at the request of Marcella, who trained as a singer, as the pair filled London Bridge with music.

Anna Lapwood and London Bridge security guard Macella came together for an impromptu musical duet on Sunday.Anna, the director of music at Pembroke College, Cambridge, played Lascia ch'io pianga by Handel.It was at the request of Marcella, who trained as a singer, as the pair filled London Bridge with music.