Tesco achieved its best market share since 2016, with UK and Ireland like-for-like sales rising by 3.7% over six weeks leading to January 4. The supermarket aims for around £2.9 billion in retail underlying earnings, despite lower sales growth compared to the previous Christmas. Tesco's Chief Executive, Ken Murphy, emphasized efforts to keep prices low amid rising costs and inflation pressures. Greggs reported a 2.5% sales growth in the fourth quarter, but lower consumer confidence affected high-street sales, according to Chief Executive Roisin Currie.