The deal is the first issuance of the Lannraig Master Trust.
Moody’s has assigned an AAA rating to £670m of the notes but has not rated the remaining £159m.
The residential-mortgage backed security is backed by a pool of buy-to-let mortgage loans originated by Clydesdale and Yorkshire.
Most of the loans previously formed part of the portfolio in Clydesdale’s Prime RMBS Lanark Master Trust until its restructure in June 2011.
Moody’s says the RMBS has a portfolio expected loss of 2%, which is higher than the UK buy-to-let average of 1.7%. The figure takes into account the collateral performance of the banks’ loans to date, the economic environment and potential impact of future interest rate rises on buy-to-let portfolios.