Wimbledon diary: tech bunkers, birds stop play and safe serve records

Fans are flocking to the official app, Madison Keys had an unusual court interloper, while the big servers have gone home

More than half a million spectators will pour through the turnstiles in south-west London this week, but that is just a small fraction of the number who will follow the action via the Wimbledon app, where point-by-point scores from every match on every court are available within seconds.