DBRS Confirms Ratings of Tower Bridge Funding No. 3 PLC

DBRS Ratings Limited (DBRS) confirmed the ratings on the notes issued by Tower Bridge Funding No. 3 PLC (the Issuer) as follows:

-- Class A confirmed at AAA (sf)
-- Class B confirmed at AAA (sf)
-- Class C confirmed at A (high) (sf)
-- Class D confirmed at A (low) (sf)
-- Class E confirmed at BBB (sf)

The ratings on the Class A and Class B notes address the timely payment of interest and ultimate payment of principal on or before the legal final maturity date. The ratings on the Class C, Class D and Class E notes address the ultimate payment of interest and principal on or before the legal final maturity date.

The confirmations 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 (CE) to the notes to cover the expected losses at their respective rating levels.

Tower Bridge Funding No. 3 PLC is the third securitisation of residential mortgages originated by Belmont Green Finance Limited (BGFL), a specialist U.K. mortgage lender that offers a full suite of mortgage products including owner-occupied, buy-to-let, adverse-credit-history and interest-only loans. The securitised mortgage portfolio comprises newly originated first-lien home loans, originated by BGFL through its Vida Homeloans brand. BGFL is the named mortgage portfolio servicer but delegates its day-to-day servicing activities to Homeloan Management Limited.

PORTFOLIO PERFORMANCE
As of the end of May 2019, the 90+ delinquency ratio was 0.2%, up from 0.0% at the closing date. The cumulative loss ratio was 0.0%.

PORTFOLIO ASSUMPTIONS
DBRS conducted a loan-by-loan analysis of the remaining pool of receivables and updated its base case PD and LGD assumptions to 6.3% and 22.2%, respectively.

CREDIT ENHANCEMENT
As of the June 2019 payment date, CE to the rated notes (calculated as a percentage of the outstanding collateral balance and provided by subordination of junior classes and the General Reserve Fund) has decreased since issuance.Class A CE fell to 18.9% from 20.0%, Class B CE fell to 13.2% from 14.3%, Class C CE fell to 8.6% from 9.8%, Class D CE fell to 5.9% from 7.1% and Class E CE fell to 3.8% from 5.1% at the DBRS initial rating.

The decrease in CE is because of an increase in undercollateralisation resulting from the use of principal available funds to top up the Liquidity Reserve Fund on the first interest payment date. As the Liquidity Reserve Fund amortises, excess amounts are released through the principal waterfall, which will reduce the level of undercollateralisation in the transaction.

The transaction benefits from a Liquidity Reserve Fund of GBP 6.6 million and a General Reserve Fund of GBP 12.5 million. The Liquidity Reserve Fund covers senior fees and interest on the Class A and Class B notes, while the General Reserve Fund covers senior fees, interest and principal (via the Principal Deficiency Ledgers) on the rated notes.

Elavon Financial Services DAC, U.K. branch acts as the account bank for the transaction. Based on the DBRS private rating of 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 considers the risk arising from the exposure to the account bank to be consistent with the ratings assigned to the Class A and Class B notes, as described in DBRS's "Legal Criteria for European Structured Finance Transactions" methodology.

NatWest Markets Plc acts as the swap counterparty for the transaction. DBRS's Long-Term Critical Obligations Rating of NatWest Markets Plc at A is above the First Rating Threshold as described in DBRS's "Derivative Criteria for European Structured Finance Transactions" methodology.

The transaction structure was analysed in Intex DealMaker.

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

The principal methodology applicable to the ratings is the “Master European Structured Finance Surveillance Methodology”. DBRS has applied the principal methodology consistently and conducted a review of the transaction in accordance with the principal methodology.

A review of the amended transaction legal documents has been conducted following an amendment executed on 2 September 2019, modifying the definition of “Authorised Investments”. A review of the remaining transaction legal documents was not conducted as the legal documents have remained unchanged since the most recent rating action.

Other methodologies referenced in this transaction are listed at the end of this press release. These may be found on www.dbrs.com at: http://www.dbrs.com/about/methodologies.

For a more detailed discussion of the sovereign risk impact on Structured Finance ratings, please refer to “Appendix C: The Impact of Sovereign Ratings on Other DBRS Credit Ratings” of the “Rating Sovereign Governments” methodology at: http://dbrs.com/research/333487/rating-sovereign-governments.pdf.

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

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

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

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

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

The last rating action on this transaction took place on 20 September 2018, when DBRS finalised its provisional ratings on the notes.

The lead analyst responsibilities for this transaction have been transferred to Andrew Lynch.

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

To assess the impact of changing the transaction parameters on the rating, DBRS considered the following stress scenarios as compared with the parameters used to determine the rating (the “Base Case”):

-- DBRS 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 are 6.3% and 22.2%, respectively.
-- The Risk Sensitivity overview below illustrates the ratings expected if the PD and LGD increase by a certain percentage over the base case assumption. For example, if the LGD increases by 50%, the rating of the Class A notes would be expected to fall to AA (high) (sf), assuming no change in the PD. If the PD increases by 50%, the rating of the Class A notes would be expected to fall to AA (high) (sf), assuming no change in the LGD. Furthermore, if both the PD and LGD increase by 50%, the rating of the Class A notes would be expected to fall to A (sf).

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

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

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

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

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

For further information on DBRS historical default rates published by the European Securities and Markets Authority (ESMA) in a central repository, see: http://cerep.esma.europa.eu/cerep-web/statistics/defaults.xhtml.

Ratings assigned by DBRS Ratings Limited are subject to EU and US regulations only.

Lead Analyst: Andrew Lynch, Assistant Vice President
Rating Committee Chair: Alfonso Candelas, Senior Vice President
Initial Rating Date: 28 August 2018

DBRS Ratings Limited
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Registered and incorporated under the laws of England and Wales: Company No. 7139960.

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

-- Legal Criteria for European Structured Finance Transactions
-- Master European Structured Finance Surveillance Methodology
-- Operational Risk Assessment for European Structured Finance Servicers
-- European RMBS Insight Methodology
-- European RMBS Insight: U.K. Addendum
-- Interest Rate Stresses for European Structured Finance Transactions
-- Derivative Criteria for European Structured Finance Transactions

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

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