Twin Bridges 2026-1 wins provisional RMBS ratings for UK buy-to-let notes

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Twin Bridges 2026-1 RMBS ratings

Highlights

Twin Bridges 2026-1 plc received provisional ratings up to (P) AAA (sf) from Morningstar DBRS for its UK buy-to-let RMBS notes, backed by a GBP 400.1 million portfolio as of 30 April 2026.
The structure features 10.11% initial credit enhancement for Class A Notes, a 1.0% liquidity reserve fund, and a 0.20% nonamortising general reserve fund to support payment resilience.
A 39-month revolving period until October 2029 and a fixed-to-floating interest rate swap with Lloyds Bank Corporate Markets plc address portfolio replenishment and interest rate risk management.

Provisional ratings and transaction structure

As reported by Morningstar DBRS, DBRS Ratings Limited assigned provisional ratings of (P) AAA (sf) to the Class A Notes, (P) AA (sf) to the Class B Notes, (P) A (sf) to the Class C Notes, (P) BBB (high) (sf) to the Class D Notes, and (P) B (sf) to the Class X Notes of Twin Bridges 2026-1 plc. Morningstar DBRS does not rate the Class Z Notes.

The Class A rating addresses timely interest payment and ultimate principal repayment by the final maturity date in October 2071. The Class B, Class C and Class D ratings address timely interest payment once each becomes the most senior outstanding class, and otherwise ultimate interest and principal repayment by October 2071, while the Class X rating addresses ultimate interest and principal payment by the same legal final maturity date.

The issuer is a bankruptcy-remote special-purpose vehicle incorporated in the UK. Proceeds from the notes fund the purchase of UK first-lien buy-to-let mortgage loans originated and serviced by Paratus AMC Limited under its Foundation trading name, while CSC Capital Markets UK Limited is set to act as backup servicer facilitator.

The provisional portfolio as of 30 April 2026 totals GBP 400.1 million and is backed by UK buy-to-let properties. Morningstar DBRS said the pool has a weighted-average seasoning of about 15 months and a current weighted-average coupon of 5.9%.

The structure includes a prefunding mechanism financed through note overissuance, allowing the issuer to buy additional mortgage loans before the first interest payment date. It also contains a 39-month revolving period up to October 2029, during which the issuer may acquire additional eligible loans, subject to available funds and the absence of a revolving termination event.

Liquidity support and market implications

The transaction is set up with initial credit enhancement of 10.11% for the Class A Notes, provided through the subordination of the Class B to Class D Notes, excluding the general reserve fund from that calculation. Morningstar DBRS said the structure also relies on a liquidity reserve fund and a general reserve fund to support payments and absorb stress.

The liquidity reserve fund covers senior costs and Class A interest shortfalls, and can also support the Class B Notes under specified conditions. It is sized at 1.0% of the initial Class A and Class B balances and amortises only when there is no revenue deficit, while the general reserve fund is set at 0.20% of the Class A to Class D balances at closing and remains nonamortising.

The documentation also allows principal borrowing to cover senior costs, swap payments and interest shortfalls on the rated collateralised notes when the relevant class is senior. A fixed-to-floating interest rate swap with Lloyds Bank Corporate Markets plc is included to manage the mismatch between fixed-rate loans and liabilities linked to the daily compounded Sterling Overnight Index Average.

Counterparty roles in the structure include U.S. Bank Europe DAC, UK Branch as issuer account bank and Barclays Bank PLC as collection account bank. Morningstar DBRS said its analysis also considers the mortgage pool's credit quality, cash flow resilience, legal structure, counterparty exposure and the UK sovereign rating, currently AA with a Stable trend.

In our earlier article on Bavarian Sky UK 8 Plc’s mortgage-backed notes, we covered the deal’s expected ratings and the assessment of stable credit quality in the underlying UK residential mortgage pool. We also noted expectations for solid institutional investor demand, supported by the transaction’s structure and the broader backdrop for UK housing and rates.

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