Originally Posted by
DaveReidUK
Well the report mentions the grey colour of the topside "blending into the runway", so it doesn't sound like the Landor Pearl Grey-cum-off-white.
But yes, it was the QTR A319s that sprang to mind, I can't think of any others that fit that description at LHR.
Assuming that's the case, it narrows down the timeframe considerably, so the incident would almost certainly have been between May 2014 and November 2015.
I suspect it's actually the April 2000 incident involving a BMA A321 (so blue, not grey) and a BA 747 that the OP meant.
The BMA was on the brakes at the 09R threshold when the BA went around, passing over the A321 at approximately 120' AGL.
Aircraft Incident Report 1/2001