LONDON (Reuters) -British supermarket group Sainsbury’s is in talks to sell 18 stores in southern England to property investor LXi REIT for about 500 million pounds ($568 million).

Both companies said on Wednesday they were discussing a sale and leaseback deal.

LXi REIT said it would seek to fund the deal through a mix of new equity and debt. It said it would discuss with potential investors the possibility of an equity raising.

Sainsbury’s, Britain’s second largest grocer after Tesco, also said it had reached an agreement on the price it will pay to buy 21 stores from the Highbury and Dragon investment vehicles. It did not disclose the price, but said the deal would complete in the first half of its fiscal year to March 2024.

If the LXi REIT transaction goes ahead, the cash from that would part-fund the Highbury and Dragon deal, Sainsbury’s said.

Both deals would result in a broadly unchanged proportion of leasehold and freehold Sainsbury’s supermarkets, but with ownership and lease structures better reflecting current market conditions and the group’s priorities, it said.

Shares in Sainsbury’s were up 1.8% at 0922 GMT, while shares in LXi REIT were up 2.6%.

($1 = 0.8807 pounds)

(Reporting by James Davey; editing by William James and Mark Potter)