Why would a fighter use the afterburner and air brakes at the same time?
The first photo is from the Tornado Role Demonstration Team's display at RAF Leuchars in September 2012 (source).

That Sep '12 show or its preparation is on YouTube. Most of the instances of the air brakes as seen from the cockpit (looking behind) are followed by the swing-wing extending and the afterburner turning off (you can tell from the sound of the variable nozzle actuators).

While the photos are cool, I'd say it's just perfect timing before the pilot turned off the afterburner while slowing down.


Such example (above) can be seen after 7:40 in this video. Notice the wing position, and from the video notice the aforementioned sound once the wing is extended.

Another possible reason is slowing down for the spectators to see and hear the afterburner. That can also coincide with the fake bomb drop – a pyrotechnic wall of fire, the smoke of which can be seen in the first photo in the question (example below).


An RAF Tornado GR4 carries out a mock bombing run (BBC)