Bravo MB.
Just to clarify, the safety margin for landing and rollout can be compromised. To the extent of it being compromised is then an issue. In this case, the aircraft never experienced a runway excursion and simply required tug assistance to help taxi it back to the gate.
For those who fly out of Luton in heavies in a bit of miserable weather, surely you've used tug assistance before (either due to missing A1 turn off rwy 08 landing or B1 turn off rwy 26 landing).
Like I've already stated, this is NOT news worthy whatsoever.