Sir Cliff Richard entertains crowds on Centre Court (John Walton/PA)
(Picture: PA Wire)Sir Cliff Richard delighted Wimbledon Centre Court spectators on Sunday by leading an impromptu sing-a-long of his hit Summer Holiday.
The music icon, 81, stood up in the Royal Box as he belted out an impressive acapella rendition of the song, which he first released in 1963, and encouraged the audience to join him, singing and waving their arms.
