Press Release

DBRS Morningstar Upgrades and Confirms Credit Ratings on Canterbury Finance 4 PLC

RMBS

December 18, 2023

DBRS Ratings Limited (DBRS Morningstar) took the following credit rating actions on the notes issued by Canterbury Finance 4 PLC (the Issuer):
-- Class A2 notes confirmed at AAA (sf)
-- Class B notes upgraded to AAA (sf) from AA (high) (sf)
-- Class C notes upgraded to AA (high) (sf) from A (high) (sf)
-- Class D notes upgraded to AA (low) (sf) from A (low) (sf)
-- Class E notes upgraded to BBB (sf) from BB (high) (sf)
-- Class F notes upgraded to B (high) (sf) from B (sf)

The credit ratings on the Class A2 and Class B notes address the timely payment of interest and ultimate payment of principal on or before the legal final maturity date in May 2058. The credit ratings on the Class C, Class D, Class E, and Class F notes address the ultimate payment of interest and principal on or before the legal final maturity date.

The credit rating actions follow an annual review of the transaction and are based on the following analytical considerations:

-- Portfolio performance, in terms of delinquencies, defaults, and losses.
-- Portfolio default rate (PD), loss given default (LGD), and expected loss assumptions on the remaining receivables.
-- Current available credit enhancement to the notes to cover the expected losses at their respective credit rating levels.

The transaction is a securitisation of buy-to-let residential mortgage loans originated and serviced by OneSavings Bank plc.

PORTFOLIO PERFORMANCE
As of November 2023, loans two to three months in arrears represented 0.6% of the outstanding portfolio balance, and loans at least three months in arrears represented 1.8% of the outstanding portfolio balance. As of November 2023, the cumulative default ratio was 0.0%.

PORTFOLIO ASSUMPTIONS AND KEY DRIVERS
DBRS Morningstar conducted a loan-by-loan analysis of the remaining pool of receivables and has updated its base-case PD and LGD assumptions at the B (sf) credit rating level to 5.1% and 11.8%, respectively.

CREDIT ENHANCEMENT
As of the November 2023 payment date, credit enhancement to the Class A2, Class B, Class C, Class D, Class E, and Class F notes was 38.2%, 29.2%, 19.6%, 13.4%, 7.7%, and 1.5%, respectively, up from 19.7%, 15.3%, 10.5%, 7.4%, 4.6%, and 1.5% at the last annual review, respectively. Credit enhancement is provided by the subordination of the junior classes of notes and a general reserve fund.

The transaction benefits from a general reserve fund of GBP 11.6 million, available to cover senior fees, interest, and principal (via the principal deficiency ledgers) on the Class A2 to Class F notes.

Elavon Financial Services DAC, U.K. Branch acts as the account bank for the transaction. Based on DBRS Morningstar’s private credit rating on Elavon Financial Services DAC, U.K. Branch, the downgrade provisions outlined in the transaction documents, and other mitigating factors inherent in the transaction structure, DBRS Morningstar considers the risk arising from the exposure to the account bank to be consistent with the credit ratings assigned to the Class A2 and Class B notes, as described in DBRS Morningstar's "Legal Criteria for European Structured Finance Transactions" methodology.

Lloyds Bank Corporate Markets plc acts as the swap counterparty for the transaction. DBRS Morningstar's private credit rating on Lloyds Bank Corporate Markets plc is above the First Rating Threshold as described in DBRS Morningstar's "Derivative Criteria for European Structured Finance Transactions" methodology.

DBRS Morningstar’s credit ratings on the notes address the credit risk associated with the identified financial obligations in accordance with the relevant transaction documents.

DBRS Morningstar’s credit ratings on the notes also address the credit risk associated with the increased rate of interest applicable to the notes if the notes are not redeemed on the Optional Redemption Date (as defined in and) in accordance with the applicable transaction documents.

DBRS Morningstar’s credit ratings do not address non-payment risk associated with contractual payment obligations contemplated in the applicable transaction documents that are not financial obligations.

DBRS Morningstar’s long-term credit ratings provide opinions on risk of default. DBRS Morningstar considers risk of default to be the risk that an issuer will fail to satisfy the financial obligations in accordance with the terms under which a long-term obligation has been issued.

ENVIRONMENTAL, SOCIAL, GOVERNANCE CONSIDERATIONS
There were no Environmental/Social/Governance factors that had a significant or relevant effect on the credit analysis.

A description of how DBRS Morningstar considers ESG factors within the DBRS Morningstar analytical framework can be found in the DBRS Morningstar Criteria: Approach to Environmental, Social, and Governance Risk Factors in Credit Ratings at https://www.dbrsmorningstar.com/research/416784/dbrs-morningstar-criteria-approach-to-environmental-social-and-governance-risk-factors-in-credit-ratings.

DBRS Morningstar analysed the transaction structure in Intex DealMaker.

Notes:
All figures are in British pound sterling unless otherwise noted.

The principal methodology applicable to the credit ratings is the “Master European Structured Finance Surveillance Methodology” (11 December 2023), https://www.dbrsmorningstar.com/research/425148/master-european-structured-finance-surveillance-methodology.

Other methodologies referenced in this transaction are listed at the end of this press release.

DBRS Morningstar has applied the principal methodology consistently and conducted a review of the transaction in accordance with the principal methodology.

A review of the transaction legal documents was not conducted as the legal documents have remained unchanged since the most recent credit rating action.

For a more detailed discussion of the sovereign risk impact on Structured Finance credit ratings, please refer to “Appendix C: The Impact of Sovereign Ratings on Other DBRS Morningstar Credit Ratings” of the “Global Methodology for Rating Sovereign Governments” at: https://www.dbrsmorningstar.com/research/421590/global-methodology-for-rating-sovereign-governments.

The DBRS Morningstar Sovereign group releases baseline macroeconomic scenarios for rated sovereigns. DBRS Morningstar analysis considered impacts consistent with the baseline scenarios as set forth in the following report: https://www.dbrsmorningstar.com/research/384482/baseline-macroeconomic-scenarios-application-to-credit-ratings.

The sources of data and information used for these credit ratings include investor reports and loan-level data provided by Elavon Financial Services DAC, U.K. Branch.

DBRS Morningstar did not rely upon third-party due diligence in order to conduct its analysis.

At the time of the initial credit rating, DBRS Morningstar was supplied with third-party assessments. However, this did not impact the credit rating analysis.

DBRS Morningstar considers the data and information available to it for the purposes of providing these credit ratings to be of satisfactory quality.

DBRS Morningstar does not audit or independently verify the data or information it receives in connection with the credit rating process.

The last credit rating action on this transaction took place on 17 November 2023, when DBRS Morningstar discontinued the credit ratings on the Class A1 and Class X notes because of their redemption in full. Prior to that, the last credit rating action took place on 19 December 2022, when DBRS Morningstar upgraded the credit rating on the Class D notes, confirmed the credit ratings on the Class A1, Class A2, Class B, Class C, Class E, Class F, and Class X notes, and removed the Under Review with Positive Implications status on the Class B, Class C, Class D, Class E, and Class F notes following the finalisation of DBRS Morningstar’s “European RMBS Insight: UK Addendum” methodology.

Information regarding DBRS Morningstar credit ratings, including definitions, policies and methodologies is available at www.dbrsmorningstar.com.

Sensitivity Analysis: To assess the impact of changing the transaction parameters on the credit ratings, DBRS Morningstar considered the following stress scenarios as compared with the parameters used to determine the credit ratings (the Base Case):

-- DBRS Morningstar expected a lifetime base-case PD and LGD for the pool based on a review of the current assets. Adverse changes to asset performance may cause stresses to base-case assumptions and therefore have a negative effect on credit ratings.
-- The base-case PD and LGD of the current pool of loans for the Issuer at the B (sf) credit rating level are 5.1% and 11.8%, respectively.
-- The risk sensitivity overview below illustrates the credit ratings expected if the PD and LGD increase by a certain percentage over the base-case assumption.

Class A2 Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in LGD, expected credit rating of AAA (sf)
-- 25% increase in PD, expected credit rating of AAA (sf)
-- 50% increase in PD, expected credit rating of AAA (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of AAA (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of AAA (sf)

Class B Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in LGD, expected credit rating of AAA (sf)
-- 25% increase in PD, expected credit rating of AAA (sf)
-- 50% increase in PD, expected credit rating of AAA (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of AAA (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of AAA (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of AAA (sf)

Class C Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of AA (high) (sf)
-- 50% increase in LGD, expected credit rating of AA (high) (sf)
-- 25% increase in PD, expected credit rating of AA (high) (sf)
-- 50% increase in PD, expected credit rating of AA (high) (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of AA (high) (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of AA (high) (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of AA (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of AA (low) (sf)

Class D Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of AA (low) (sf)
-- 50% increase in LGD, expected credit rating of A (high) (sf)
-- 25% increase in PD, expected credit rating of A (high) (sf)
-- 50% increase in PD, expected credit rating of A (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of A (high) (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of A (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of A (low) (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of BBB (high) (sf)

Class E Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of BBB (sf)
-- 50% increase in LGD, expected credit rating of BBB (low) (sf)
-- 25% increase in PD, expected credit rating of BBB (sf)
-- 50% increase in PD, expected credit rating of BBB (low) (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of BBB (low) (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of BB (high) (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of BB (high) (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of BB (high) (sf)

Class F Risk Sensitivity:
-- 25% increase in LGD, expected credit rating of B (high) (sf)
-- 50% increase in LGD, expected credit rating of B (high) (sf)
-- 25% increase in PD, expected credit rating of B (high) (sf)
-- 50% increase in PD, expected credit rating of B (high) (sf)
-- 25% increase in PD and 25% increase in LGD, expected credit rating of B (high) (sf)
-- 25% increase in PD and 50% increase in LGD, expected credit rating of B (high) (sf)
-- 50% increase in PD and 25% increase in LGD, expected credit rating of B (sf)
-- 50% increase in PD and 50% increase in LGD, expected credit rating of B (sf)

For further information on DBRS Morningstar historical default rates published by the European Securities and Markets Authority (ESMA) in a central repository, see: https://registers.esma.europa.eu/cerep-publication. For further information on DBRS Morningstar historical default rates published by the Financial Conduct Authority (FCA) in a central repository, see https://data.fca.org.uk/#/ceres/craStats.

This credit rating is endorsed by DBRS Ratings GmbH for use in the European Union.

Lead Analyst: Andrew Lynch, Vice President
Rating Committee Chair: Alfonso Candelas, Senior Vice President
Initial Rating Date: 6 July 2021

DBRS Ratings Limited
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London EC1Y 1HQ United Kingdom
Tel. +44 (0) 20 7855 6600
Registered and incorporated under the laws of England and Wales: Company No. 7139960

The credit rating methodologies used in the analysis of this transaction can be found at: https://www.dbrsmorningstar.com/about/methodologies.

A description of how DBRS Morningstar analyses structured finance transactions and how the methodologies are collectively applied can be found at https://www.dbrsmorningstar.com/research/278375.

For more information on this credit or on this industry, visit www.dbrsmorningstar.com or contact us at info@dbrsmorningstar.com.

ALL MORNINGSTAR DBRS RATINGS ARE SUBJECT TO DISCLAIMERS AND CERTAIN LIMITATIONS. PLEASE READ THESE DISCLAIMERS AND LIMITATIONS AND ADDITIONAL INFORMATION REGARDING MORNINGSTAR DBRS RATINGS, INCLUDING DEFINITIONS, POLICIES, RATING SCALES AND METHODOLOGIES.

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