The takeover approaches follow Spanish banks BBVA's and Sabadell's announcement this week that they are in talks to create Spain's second-biggest domestic lender by assets.

"We have received some very preliminary expressions of interest in the Bank, but this does not mean anything will come of these discussions," Sainsbury's said on Tuesday.

The Co-op Bank separately said it had received a non-binding offer from a "financial sponsor with knowledge and experience of investing in European financial services businesses" and that discussions were at an early stage.

Sky News reported that U.S. investment firm Cerberus was in talks to buy the Co-op Bank.

Co-op Bank and Cerberus declined to comment.

Sainsbury's new CEO Simon Roberts said this month its banking business could be sold and also set out a company-wide restructuring plan which could result in up to 3,500 job cuts at the group.

Sainsbury's expects the division to deliver a profit in the second half of this year despite coronavirus-related disruptions, it said.

British banks including Barclays, Lloyds Banking Group and NatWest are among possible suitors for Sainsbury's banking operations, a source familiar with the matter said.

"Other than HSBC, all the main banks in Britain are looking at Sainsbury's banking business but it will take time for people to study the books and submit a bid," he said, adding this was a slow-moving process and no deal was expected before the end of 2020.

Co-op Bank, which has been trying to recover after a near-collapse and rescue by a group of U.S. hedge funds in 2017, has been loss-making over the first three quarters of this year.

GROCERS COOL ON BANKING

In 1997 Sainsbury's became the first major British supermarket to open a bank offering anything from credit cards, savings and loan products and insurance policies.

Roberts, who succeeded Mike Coupe in June, had said earlier this month that he would focus the company on its core food business, and laid out plans to lower more prices and treble the number of new products launched each year.

Last year, rival food retailer Tesco's banking division agreed to sell a 3.7 billion pounds residential mortgage portfolio to Lloyds Banking Group.

Sainsbury's has been cutting prices on daily essentials while investing in stores, technology and online services to meet the challenges of a fast-changing industry where customers are shopping more frequently and are buying more online.

The retailer's sales have surged this year as Britons bought more groceries during coronavirus lockdowns.

(Reporting by Iain Withers and Pamela Barbaglia in London and Aakash Jagadeesh Babu in Bengaluru; editing by Keith Weir and Jane Merriman)

By Iain Withers and Pamela Barbaglia