Nationwide Building Society has mandated Barclays Capital, Citi and JPMorgan as joint lead managers for its inaugural public Silverstone 2009-1 UK RMBS benchmark transaction from the Silverstone Master Trust. The deal is expected to launch and price, subject to market conditions, following a roadshow that is scheduled to occur this week. Silverstone 2009-1 is expected to offer sterling-denominated rated notes and will be secured by a pool of prime UK first-lien residential mortgage loans.