OVERVIEW We assigned preliminary 'AAA' ratings to the class A1, A2, and A3 notes in this transaction. A pool of first-ranking mortgages secured over properties in England, Northern Ireland, Scotland, and Wales will back the notes. LONDON (Standard&Poor's) March 3, 2010--Standard&Poor's Ratings Services today assigned its preliminary 'AAA' credit ratings to the class A1, A2, and A3 notes that Fosse Master Issuer PLC will issue under its residential mortgage-backed floating- and fixed-rate series 2010-1 (see list below). Alliance&Leicester PLC originated all the loans in the master trust, however it is possible that Santander UK PLC-originated loans may be added to the pool in the future. This is a revolving structure, so the characteristics of
