Chief Executive Philip Clarke said: "During her period at Tesco Lucy has transformed the professionalism of the corporate affairs function at Tesco as well as, on the legal side, leading for the company on 3 major competition enquiries.
“Lucy has always shown unrelenting determination and great finesse and Tesco is indebted to her for many outstanding achievements, not least for leaving behind her a strong team.
“Our position, both at home and overseas, is undoubtedly much better as a consequence. We will miss her wise counsel when she retires in six months' time".
Lucy said: "I have had a fascinating career at Tesco and have greatly enjoyed representing our interests around the world and building a great team. The company has grown enormously in size and profits since I joined and I am proud that, with many others, I have contributed to its success."
Lucy's responsibilities will be divided between Adrian Morris, who will join from BP as Group General Counsel on 3 September and Rebecca Shelley, who joined the Group from Brunswick on 1 May and will take responsibility for Corporate Affairs. Both will join the Group Executive Committee chaired by Philip Clarke.
Tesco PLC