Shanwick
It's close, but not that close!
I can assure you that the photo is pretty realistic. The runway separation is minimal, and I have touched down simultaneously on 28R (in a 747-400) with one on 28L.
For sure, it doesn't happen on every approach by a long way, but it does happen.
It wouldn't surprise me if the Qantas went around because the captain was handling and lost sight of the other aircraft.
ATC issuing instructions 'do not overtake...' can be unrealistic when you are in a 747 with a final approach speed of 150kts vs a turboprop at 100 or a 737 at 130.