At what scene?
Was this 'person' standing behind Nevill when he made the supposed call?
When you talk about a 'legal team' I suspect you are talking about the Campaign Team?
Perhaps the CT would like to explain why Jeremy denied calling the police as late as 03:36 UNTIL the silly story appeared about a supposed call from Nevill? Not only did he deny it, he wanted to being a prosecution against West, accusing him of lying.
Also, perhaps they might also like to explain why Bonnett (a civilian employee) would lie about who he spoke to that night?