Wm Morrison Supermarkets : Asda the best Christmas performer of UK's big four grocers - Kantar Worldpanel

LONDON (Reuters) - Asda was the best performer of Britain's big four supermarket groups in the key Christmas quarter, though all lost market share to discounters Aldi and Lidl, industry data showed on Tuesday.

Market researcher Kantar Worldpanel said sales at Walmart's Asda, which has agreed to be taken over by Sainsbury's, rose 0.7 percent in the 12 weeks to Dec. 30. Market leader Tesco sales rose 0.6 percent, whiles sales at No. 4 Morrisons edged up 0.1 percent. Sales at Sainsbury's fell 0.4 percent.

Sales growth at Aldi and Lidl was 10.4 and 9.4 percent respectively, taking their combined market share to 12.8 percent, the Kantar data, which broadly mirrored data from rival researcher Nielsen, showed.

(Reporting by James Davey; editing by Kate Holton)