The incident took place at some point around 8pm tonight (September 28).
A Korean Air Boeing 777-300 was taxiing to runway 27R when it clipped another aicraft.
The plane (reg. HL7782) was performing flight #KE908 to Seoul.
It clipped an Icelandair Boeing 757 (reg. TF-FIK) waiting for guidance onto stand.
Listen to Heathrow ATC at cam.airlive.net (for members).
Heathrow Airport has confirmed that the incident took place, but did state that it wasn’t a “full on” collision.