Tesco had a pretty rubbish first six months. Dave Lewis, the CEO that has now been in the job for 13 months, revealed that the largest supermarket in Britain posted a 55% drop in its first half operating profit and like-for-like sales in the same period fell by 1.1%. Some may see the sales figures as a victory for Lewis and Tesco because analysts had anticipated a steeper drop of 1.5% in same store sales, excluding petrol.