Tesco was in the spotlight this week after the publication of its annual results confirmed what a challenging year the UK's largest retailer endured. Another UK grocer under scrutiny is The Co-operative Group, which reported banking-induced losses, but revealed it is re-sizing its food retail estate to give it more focus. Elsewhere, China's WH Group, of which Smithfield Foods is now a part, announced plans to list in Hong Kong and US group Post Holdings made another M&A move, with a deal to buy egg-to-dairy supplier Michael Foods.