Two men guilty of student murders

So, after five weeks Sonnex and Farmer have been found guilty of the appalling murders of Gabriel Ferez and Laurent Bonomo. I was actually at the Old Bailey on the first day of the trial (in the public gallery) and had hoped to return at a later date to see if there was any mobile forensics expert witness testimony - as seemed likely given the use of mobile phones on the date in question - but unfortunately my plans changed and I didn't have the chance. If anyone knows what part this evidence played in the trial please feel free to email me.