Originally Posted by
Util BUS
At 6:03 the controller responds to their intention to climb to FL80 with "Roger" although this is non-standard terminology I would have accepted it to me "Approved" in that part of the world.
Roger is very much so ICAO standard terminology and means, I acknowledge receipt of your transmission.
It is NEVER a clearance, in no part of the world.
The required clearance would read: In case of go around climb to and maintain FL80.
I hope your airborne appearance is limited to simulator skies, otherwise I suggest to revisit an ICAO phraseology RT lesson asap.