...Our rating on Nationwide Building Society (Nationwide) continues to balance its strong capital position and business performance against its concentrated exposure to the leveraged U.K. household sector. Nationwide's deep U.K. mortgage franchise, disciplined strategic execution, and cautious risk appetite translate into significant financial resilience and support our rating. The firm delivered solid annual results in April 2024, with statutory profit before tax of ú1.8 billion (April 2023: ú2.2 billion) on the back of persistently high interest rates, a relatively low impairment charge, and good cost control. The society remains one of the U.K.'s largest residential mortgage lenders and savings providers, with a heavy focus on prime residential mortgages and a relatively small commercial lending portfolio. Together, its deep mortgage franchise, against its narrow scope, are well balanced in our rating (see chart 1)....