Why did the bus crash?

It may have been just one of those things. A bus driver takes his eye off the road for a split second and bang, straight into the back of another bus.

On the other hand, his attention might have wandered because only yards away, Sky Sports presenter Helen Chamberlain was splashing around in the Trafalgar Square fountain in her underwear.

Chamberlain, 37, was modelling a commemorative England-Euro 2004 bra when the accident happened today. An investigation is under way to find out if the driver was distracted by the Triumph International photoshoot.

Phil Monk, 26, an electrician from Croydon, was in the square at the time. He said: "I couldn't take my eyes off Helen and it looks like the bus driver was no different."