There was also a big hit from the writedown of its property portfolio.
Here, in one interactive chart, is the path leading to these car-crash results. Hover over any of the bubbles on the visualisation to reveal information about that particular twist or turn in Tesco’s fortunes.
There have been some big twists, too. Here are the top six from this year:
Tesco reveals turnaround plans including closure of 43 stores and names Matt Davies as new UK boss. In addition to the 43 stores being closed, 49 planned "very large stores" will not now be opened.
Tesco sells off Blinkbox Music to Australian firm Guvera for an undisclosed sum, but thought to be significantly less than the £10m the supermarket paid to acquire the service. Tesco bought digital service WE7 in 2012, rolling it into its digital entertainment arm, Blinkbox, and rebranding it under the new Blinkbox Music name.
Tesco employs around 314,000 staff. Around 6,000 of those at risk are threatened by the store closures.
Tesco appoints John Allan chairman. Allan began his career in marketing with Lever Brothers and Bristol-Myers, entering the food retail sector for the first time in 1977 when he joined Fine Fare where he was head of marketing, buying and retail operations.
In 2009 Allan joined Dixons Retail. Allan said it ?would be fun? to return to retail after a previous decade of experience. He was chairman of Dixons Retail until last year when the electronics retailer merged with the Carphone Warehouse group to form Dixons Carphone.
Investors prepare new legal claim over profits misstatement. The shareholders have hired a litigation specialist to seek compensation following a fall in the company's share price, after management revealed the £250m black hole in its profits.