Discount deals on Black Friday will be bigger than ever this year, with cuts of more than 60 per cent, new analysis suggests. But shoppers will need to be shrewd to avoid fake “deals”.

Thousands of products have already been heavily discounted in the wake of the Brexit vote amid fears that consumer demand would suffer, meaning shops will have to slash prices even further to capture customers’ attention.

The number of items on sale jumped 45 per cent in the week after the referendum, according to price analysis of millions of items by discount website lovethesales.com. Prices are normally reduced at the end of June as shops attempt to get rid of summer stock in readiness for autumn lines, but they normally bounce back in the following weeks.

This year prices have remained lower for many products and average reductions are now 39 per cent, up from 35 per cent. Shoppers can usually expect a further Black Friday discount of 20 per cent, meaning up to 60 per cent off in total.

The company’s founder, Mark Solomon, said: “Post-Brexit uncertainty has resulted in increased competition between retailers, reflected by more aggressive discounting of inventory. If this trend continues, this Black Friday weekend will be the biggest ever.”

Shoppers need to be savvy to get the best deals however. A report this month from consumer group, Which? found half of all products supposedly discounted for Black Friday in 2015 were actually available cheaper at other times of the year.

Consumers have also been warned that the current bargains are for a limited time only as prices will rise sharply once the effects of the Brexit-weakened pound filter through to shop floors.

Input costs such as fuel and raw materials jumped at the fastest pace ever recorded in October, the Office of National Statistics revealed last week. Costs for producers have risen 12.2 per cent over the year, with most of that increase coming since the vote in June.

Business news: In pictures Show all 13 1 /13 Business news: In pictures Business news: In pictures Flybe collapses Airline Flybe has collapsed. All future flights on the Exeter-based airline have been cancelled – leaving more than 2,300 staff facing an uncertain future, and wrecking the travel plans of hundreds of thousands of passengers. The chief executive, Mark Anderson, said: “Europe’s largest independent regional airline has been unable to overcome significant funding challenges to its business. AFP via Getty Business news: In pictures Future product placement will be 'tailored to individual viewers' Marketing executives say that product placement in films and televison shows on streaming services such as Netflix may be tailored to individuals in future. For instance, if data shows that a viewer is a fan of pepsi, a billboard in the background of a shot would host an advert for pepsi, while for a viewer known to have different tastes it could be for Coca-Cola Paramount Business news: In pictures Corbyn wishes Amazon a happy birthday In a card sent to Amazon CEO Jeff Bezos on the company's 25th birthday, Labour leader Jeremy Corbyn writes: "You owe the British people millions in taxes that pay for the public services that we all rely on. Please pay your fair share" Business news: In pictures No deal, no tariffs The government has announced that it would slash almost all tariffs in the event of a no-deal Brexit. Notable exceptions include cars and meat, which will see tariffs in place to protect British farmers Getty Business news: In pictures Fingerprint payment NatWest is trialling a new bank card that will allow people to touch their hand to the card when paying rather than typing in a PIN number. The card will work by recognising the user's fingerprint NatWest/PA Wire Business news: In pictures Mahabis bust High-end slipper retailer Mahabis has gone into administration. 2 Jan 2019 Mahabis Business news: In pictures Costa Cola Coca-Cola has paid £3.9bn for Costa Coffee. A cafe chain is a new venture for the global soft drinks giant PA Business news: In pictures RIP Payday Loans A funeral procession for payday loans was held in London on September 2. The future of pay day lenders is in doubt after Wonga, Britain's biggest, went into administration on August 30 PA Business news: In pictures Musk irks investors and directors Elon Musk has concluded that Tesla will remain public. Investors and company directors were angry at Musk for tweeting unexpectedly that he was considering taking Tesla private and share prices had taken a tumble in the following weeks Getty Business news: In pictures Jaguar warning Iconic British car maker Jaguar Land Rover warned on July 5, 2018 that a "bad" Brexit deal could jeopardise planned investment of more than $100 billion, upping corporate pressure as the government heads into crucial talks AFP/Getty Business news: In pictures Spotif-IPO Spotify traded publically for the first time on the New York Stock Exchange on Tuesday. However, the company isn't issuing shares, but rather, shares held by Spotify's private investors will be sold AFP/Getty Business news: In pictures French blue passports The deadline to award a contract to make blue British passports after Brexit has been extended by two weeks following a request by bidder De La Rue. The move comes after anger at the announcement British passports would be produced by Franco-Dutch firm Gemalto when De La Rue’s contract ends in July. The British firm said Gemalto was chosen only because it undercut the competition, but the UK company also admitted that it was not the cheapest choice in the tendering process. Business news: In pictures Beast from the east economic impact The Beast from the East wiped £4m off of Flybe’s revenues due to flight cancellations, airport closures and delays, according to the budget airline’s estimates. Flybe said it cancelled 994 flights in the three months to 31 March, compared to 372 in the same period last year.

Manufacturers hedge themselves against currency movements, meaning many have not yet felt the brunt of the effects.