Manager A from Sainsbury sheds light on the reasons behind the closure of Netto's operations in the UK. The decision was not based on lack of business but rather the need for a significant investment to take Netto to the next level. Challenges faced included securing property for physical outlets and finding a strategy that would work for the UK market. The decision was made after considering customer reviews, trade market data, and the cost of expansion. Sainsbury plans to focus on their core business and their commitment to HRG.