Taylor Swift‘s ‘Eras Tour’ are expected to boost the London economy by £300million.The ‘Anti-Hero’ singer will perform three sold-out shows at Wembley Stadium starting tonight (June 21) before returning for a five-night stretch in August – with experts forecasting her career-spanning tour will be one of the most lucrative of all time.These shows are expected to be attended by nearly 640,000 fans, with many already camping outside the stadium ahead of tonight’s edition, despite warnings from the venue’s organisers.The Greater London Authority (GLA) has estimated these keen fans will spend an average of £471 per show, providing a massive boost to London’s economy, with many travelling from further afield to see Swift.After debuting the ‘Taylor’s Version’ of the London Tube map ahead of the shows this week, Mayor of London Sadiq Khan has said he is “delighted” London is hosting the ‘Eras Tour’ more than any other city.This Taylor Swift Tube map has polished up real nice