The match was played in front of a half empty Villa Park but the Vienna fans, many waving their shirts around rather than wearing them, made plenty of noise throughout.

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The disks transmit a signal to a server that either the space is empty or a driver has paid to park there.

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"The bars are full of souls so empty, " a barefoot Criolo sang in Central Park, wearing a yellow guayabera and white slacks, to an arm-waving crowd.

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In the vast factory complex, the only sign of life is the hum of a petrol generator as crews work on the abandoned interior - the empty spaces of the fenced-off car park testament to the thousands who would at one time have worked there.

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