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An key impact of a Brexit no deal for consumers will be on prices. Over a quarter of our food comes from the EU, much of which will face extra import charges - or tariffs - typically of over 15%. Cars too will be hit by tariffs of 10%.

Retailers are likely to pass some of that to us.

The government is mindful of that. One thing it could do is to temporarily relax some tariffs - it would have to do the same for all countries with which the UK hasn’t got a deal.

That had, until earlier this year, been the contingency plan. It would ease some of the pressure on consumers and retailers but would be unpopular with domestic producers e.g. farmers and manufacturers, whom tariffs are designed to protect from foreign competition

Other factors will also impact the prices we pay for imports, from disruption at the border, to movements in the exchange rate. Some traders are warning that the value of the pound will fall in the event of a no-deal which would push up those prices.

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Businesses are facing a huge degree of uncertainty as Brexit talks teeter on a knife-edge.

Many won't even know what the price of their goods will be, according to British Chambers of Commerce president Baroness Ruby McGregor-Smith.

"We're not going to know what tariffs are going to be imposed on any goods leaving or coming into the country, meaning we won't know the price," she told Sky News.

"What we've seen in the pandemic is huge amounts of support given but we still have a significant number of industries shut down. On top of this we don't know how we're going to be trading from 1 January."

She added there "could be some significant job losses" compounded by a "lack of government support after March as we come out of the pandemic".