A food store was unveiled on October 22 in Summertown, Oxford.
The Marks & Spencer shop will sell food, wines, household goods, and underwear. It will also house a bakery and 25-seat coffee shop. About 80 jobs have been created.
Work to convert the former Allied Carpets store in Banbury Road began in August.
Store manager Mark Goodson said: "It's been a rush but we've got there. I look forward to welcoming the people of Summertown and the surrounding areas to the store. We're sure it will be a hit."
Justin King, M&S food business director, said: "We're delighted to reinforce our commitment to the county with this significant investment."
Marks & Spencer has invested £2m to rejuvenate its Oxford and Banbury stores during the past year.
Mr King added: "We're confident the site in Summertown, with its excellent location and accessibility for commuters and residents, will allow us to build on the success of the past year."
The nearby Co-op supermarket is launching a fair trade initiative -- supporting local food and ethical trading -- to compete with the M&S store.
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