"Two airplanes have hit into each other on the runway at Heathrow Airport this evening (Wednesday, September 28). The nature of the incident was not clear at first, but witnesses report that the wings of two planes hit into each other. It is not believed to be a serious incident."
List of incidents in the past 10 days: https://www.asias.faa.gov/apex/f?p=100:93:::NO:::
By my reading, of the 8 incidents reported in the last 10 days for Airbus and Boeing aircraft, 7 were collisions with birds and one was:
> AIRCRAFT LANDED AND POST FLIGHT INSPECTION REVEALED DAMAGE TO RIGHT LANDING GEAR AND FLAPS, HOUSTON, TX.
Nothing about two planes colliding on a runway.
Airbus/Boeing accidents while taxing:
https://www.asias.faa.gov/apex/f?p=100:11:::NO:::
2021: 1
20210220001669I - ON TAXI OUT FROM THE DE-ICE PAD THE RIGHT WING STRUCK AN IMPROPERLY PLACED DE-ICE TRUCK
2020: 1
20201220018589I - SUSTAINED RIGHT WINGTIP DAMAGE FROM STRIKING A LIGHT POLE
2019 - 4 ...
20190729005662I - G-CKWE STRUCK N819AN?S RIGHT WINGTIP WITH THEIR RIGHT WINGTIP
20190610006432I - ASAA STRUCK THE RIGHT HORIZONTAL STABILIZER OF THE PARKED EMBRAER 175 WITH THEIR LEFT WINGLET
20190418002979I - THE AIRCRAFT STRUCK A RUNWAY EDGE LIGHT
They can get pretty funny. The first one I clicked into was "ingested snowbank and a light"
Not only you need major mistakes by multiple people and systems for two planes to touch while taxing, but two planes colliding even in an apparently minor way is enough to ground the planes for controls.
There is absolutely nothing minor or common about a collision of airliners on a runway at a major airport.
Similar mistakes have resulted in serious incidents. There will be a full investigation of this.
If it's just a wingtip Boeing sends a AOG (Airplane On Ground) team to repair it onsite. They remove the wing skin replace any ribs, spars, wiring, lighting, etc, that are damaged, before riveting a new skin over it.