Amazon is stepping up its rollout of till-free technology by launching two more Amazon Fresh stores in London.

The Grocer reports that the sites, where customers can “just walk out” with their shopping, will be in East Sheen and Chingford.

It means the multinational will have created nine Fresh stores in Britain since March.

By contrast, Tesco unveiled a checkout-free store in Welwyn Garden City three years ago, but only opened its second – in Holborn – last month.

READ MORE: Amazon unveils fifth Fresh store in Camden

In what looks like an early declaration of war, Amazon is preparing to open another store just 120 yards away.

Figures from Edge by Ascential show that Tesco, Britain’s largest retailer, will see its revenue overtaken by Amazon by 2025.

The first Fresh store in Ealing was the e-commerce titan’s first physical retail site outside North America.

It has since opened a “4-star” store at the Bluewater Shopping Centre in Kent, selling items rated four stars or more by online customers.

A second is expected to launch at Westfield in Stratford this week.

 Click here to sign up to Grocery Gazette’s free daily email newsletter