According the the Daily Mirror,
"We had been taxiing around for ages before we finally got on to the runway and began to accelerate to take-off speed.
"About half way down the runway we smashed into the other plane."
Paul Murray, on board the 737, told how their aircraft was hit from behind as it waited for clearance to take off
Now I am no expert in any way but even I can work out that if this had of happened there would have been far more damage and many people seriously injured.
If the event is as previous posts implied then this is a disgraceful piece of reporting.