High street giant Marks & Spencer on Tuesday said it had "turned the corner" as its recovery continued with a 30.7 per cent jump in pre-tax profits to£646.7 million compared to £494.8m in the year-ago period. Those figures follow a 10.6 per cent surge in April same-store sales amid a shopping boom and a huge restructuring drive which has seen it exit all its loss-making and non-core activities in continental Europe and the US.