SUPERMARKET giant Tesco is on track to become the world’s second largest retailer within four years, according to new research.

The UK’s biggest supermarket is expected to deliver annual sales of £106.7 billion by 2012, overtaking French retailer Carrefour and ranking behind world leader Wal-Mart, said international grocery market expert IGD.

Its latest report predicts that international expansion in markets such as China and India will help Tesco to grow its turnover by two thirds between 2007 and 2012 despite the economic turmoil.