From the Open Data Institute, an interactive looking at diet data made available by Department for Environment, Food and Rural Affairs. “The British diet has undergone a transformation in the last half-century. Traditional staples such as eggs, potatoes and butter have gradually given way to more exotic or convenient foods such as aubergines, olive oil and stir-fry packs.”
The above is just an overview. You can see detailed breakdowns for meat, fish, vegetables, and more. You can also sort by time series characteristics, such as biggest rise, biggest fall, and most steady. Poor ox liver didn’t even see it coming.