Jupiter Mortgage No.1 PLC is a static RMBS transaction that securitizes a portfolio of £2.00 billion owner-occupied and buy-to-let (BTL) mortgage loans secured on properties in the U.K. It refinances the original transaction that closed in March 2021 (see "New Issue: Jupiter Mortgage No.1 PLC," published on March 10, 2021). At closing, there was no sale of mortgages as this had happened during the original transaction.