By Elliot Gulliver-Needham St James’s Place is no stranger to high fees. Britain’s largest wealth manager has been pilloried for its high costs, from its controversial exit fee (now being phased out) to the high fees on its pension funds. Now, St James’s Place has earned a new accolade and a new issue with fees. The group’s Polaris range has become the largest multi-asset fund range in the country, surpassing Vanguard’s Lifestrategy range of funds. The four-fund range grew by £9bn in just two months, taking assets to more than £44bn, compared to £37bn for Vanguard’s Lifestrategy range. However…