Inspectors are demanding the immediate release of loyalty card statements in order to trace customers? payments to retailers back to private bank accounts and credit cards.
According to Digita.com, two supermarket chains have already provided customer information to them.
It is feared that the next move will be DIY chains such as Homebase and Wickes, where small jobbing builders often buy materials.
By comparing spending records with bank statements, the Revenue might discover undisclosed bank accounts or large cash payments.
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