Black Friday returns on Friday 23 November, followed by Cyber Monday on Monday 26 November.

Marking the start of the festive shopping season, Black Friday is an American tradition and the informal name given to the day following Thanksgiving Day. Retailers are widely known to reduce inventory prices, making the day increasingly popular for consumers.

Cyber Monday is a cunning marketing initiative, given to the Monday following Thanksgiving Day to spur the sales of online shopping.

Click here to view advice for businesses and security from the National Business Crime Centre.

Click here to view letter to retailers.