London's FTSE index closes lower
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(Close): Shares in the FTSE 100 closed lower on Wednesday, having initially opened higher.
The FTSE 100 fell 0.49%, or 34.69 points, to 7,028.24, with supermarket chain Tesco the biggest faller.
Tesco's shares fell more than 5% after it reported its biggest ever loss.
The supermarket giant reported a statutory pre-tax loss of £6.4bn for the year to the end of February, with the boss Dave Lewis admitting it had been a "difficult year".
John Rishton, who has been at the company since 2011, will be replaced by Warren East, former head of the chipmaker Arm Holdings.