The AAIB Report tells us when the failure occurred and generally how it happened so we can roughly guess as to the rate and extent of pedal travel and time from liftoff that the Pilot lost control of Yaw.
Perhaps applying that information to Dash and Climb method that is being debated.....to get a good guess at what point the loss of yaw control would occur and thus make an assumption as to what forward speed and height the aircraft would have be at.....would be an interesting comparison to what did happen.
My bet is it would have be at a low height at a fairly low airspeed and probably. not clear of obstacles.....which would be a very bad situation to deal with.
We have to include the take off to a hover, the time required to hover back as far as possible, the time to point the aircraft to the takeoff heading, then accelerate towards the obstacles, hit some speed at or slightly above Translational Lift speed, then rotate the nose upwards, and climb until reaching a safe height above the obstacles.....then lower the nose and accelerate to Vy.....and of course all of the pedal movements that would be required in the process.
What if the yaw control failure happened while in the hover maneuvers prior to start of the take off run?
Anyone care to take a whack at that?