EFHF - thank you for a reasoned response.
simfly - you get it. So does MikeAlphaTangoTango.
Power was at X. They asked for X+. "Engines did not respond."
No one here knows what X was.
The AAIB report mentions -
Following further demands for increased thrust from the Autothrottle, and subsequently the flight crew moving the throttle levers, the engines similarly failed to respond. The aircraft speed reduced and the aircraft descended onto the grass short of the paved runway surface.
They're at 600'. They should be very close to stabilized Vref. So why did the AAIB include that statement? We'll have to see what the facts are when the AAIB releases them.