I will put my money on the old KILLER TILLER. Probably caused by a nose wheel touchdown, speed a bit high, a crosswind and the aircraft cantering around the nose wheel which unlocked when it touched down. When the main wheels touched down the nose wheel out of centre position caused the aircraft to veer off the runway violently. This has always been a problem on the twatter and it is very difficult to see the tiller moving when the pilots eyes are looking down the runway.
Sad to see the old beast in a mess and very glad that all survived. My sympathies with the crew and hope they will be back in the air having learnt valuable lessons from this. Keep you chin up boys.
Wooblah.