The IRI weekly news update highlights significant developments in the packaged grocery sector, including Tesco's decision to increase pay for staff by 10.5%, the sale of Holland & Barrett to L1 Retail for £1.77 billion, and Tesco launching a one-hour grocery delivery service in London. Other key updates include Debenhams warning about market volatility impacting profits, the Co-op being recognized as the top destination for top-up shops, and Ocado testing autonomous delivery technology. The document emphasizes ongoing changes in the retail landscape as companies adapt to new consumer demands and market conditions.