LONDON, England, July 8 (TNSrpt) -- Queen Mary University of London issued the following news: * * * Sponsorship is key to progressing the leadership pipeline, but why do only a quarter of these relationships work? A research report launched today shows that sponsorship is a critical part of progression into senior leadership roles, because it teaches individuals how advancement actually works in practice. - But only a small proportion of sponsorship relationships - less than a quarter - are characterised by the mutual trust, candid feedba more PR