By Laura McGuire A business group that represents dozens of major retailers on London’s Oxford Street has called for a “comprehensive” reform to business rates to boost Britain’s high streets. As part of its new manifesto for the next government, the New West End Company said it is calling for a “fairer system that does not simply shift the bill to online businesses but reflects the reality of today’s multi-channel sales model”. A report by Atlus Group last year found that a host of retail, hospitality and leisure properties in London could be faced with an extra £575.55m in business rates nex…