By Michael Holden LONDON (Reuters) – A libel trial pitting the wives of two former England soccer strikers Wayne Rooney and Jamie Vardy kicked off on Tuesday, a battle mixing glamour, amateur sleuthing and a sting operation which has gripped the media and public. The case involves Coleen Rooney, 36, the wife of former England ace Wayne who holds the record for the most international goals for his country, and Rebekah Vardy, whose husband Jamie has also played and scored for the national side Vardy, 40, is suing her former friend for libel after Rooney accused her of leaking stories about her a…