The restrictions will start at 00:01 GMT, despite 55 Tory MPs voting against the government.
The 242-year-old department store is offering huge discounts after it collapsed on Tuesday.
Shop prices are falling in the run-up to Christmas as retailers race to clear stock, a report says.
Ministers are "taking limited responsibility" for readiness ahead of the transition period ending, MPs say.
More than a million tests will be sent to care homes in England to allow safe indoor visits.
Most of its 1,500 staff will be put on furlough while the measures are in force, Brains says.
A PPE delivery is believed to have come from a Chinese factory suspected of using a labour scheme.