Flightradar24 - NOT amateur radio

On my Android phone I am able to track my son and family on their plane journey back from Australia. This is a free app available on the Play Store. It has quite a good rating (4.7 out of 5) and is supported by ads.

Be careful!! There are several with very similar names.

UPDATE 1957z: After a flight from Hong-Kong of almost 12 hours they are now approaching the UK. They will be knackered!