STRATS Trust for AMBAC Financial Group, Inc. Securities, Series 2007-1 10-K

Exhibit 34.1



(EY LOGO)



Report
of Independent Registered Public Accounting Firm



The
Board of Directors

U.S.
Bank National Association



We
have examined management’s assertion, included in the accompanying Report on Assessment of Compliance with Applicable Servicing
Criteria, that U.S. Bank National Association (the “Company”) complied with the servicing criteria set forth in Item
1122 (d) of the Securities and Exchange Commission’s Regulation AB for the U.S. Bank Corporate Trust Repackaging Platform
(the “Platform”), for which the company provides servicing functions for publicly issued transactions comprised of
the repackaging of corporate debt and/or other agency securities, as of and for the year ended December 31, 2017, except for servicing
criteria 1122 (d)(1)(i), 1122 (d)(1)(iii), 1122 (d)(1)(v), 1122 (d)(2)(iii), 1122 (d)(4)(i), 1122 (d)(4)(vi) and 1122 (d)(4)(ix)-(xv),
which the Company has determined are not applicable to the activities performed by them with respect to the servicing platform
covered by this report. Management is responsible for the Company’s compliance with those servicing criteria. Our responsibility
is to express an opinion on management’s assertion about the Company’s compliance with the servicing criteria based
on our examination.



Our examination was conducted in accordance with attestation standards established by the American Institute
of Certified Public Accountants, as adopted by the Public Company Accounting Oversight Board (United States) and, accordingly,
included examining, on a test basis, evidence about the Company’s compliance with the applicable servicing criteria and performing
such other procedures as we considered necessary in the circumstances. Our examination included testing of less than all of the
individual asset-backed transactions and securities that
comprise the Platform, testing of less than all of the servicing activities related to the Platform, and determining whether the
Company processed those selected transactions and performed those selected activities in compliance with the servicing criteria.
Furthermore, our procedures were limited to the selected transactions and servicing activities performed by the Company during
the period covered by this report. Our procedures were not designed to determine whether errors may have occurred either prior
to or subsequent to our tests that may have affected the balances or amounts calculated or reported by the Company during the period
covered by this report for the selected transactions or any other transactions. Although the Company is responsible for assessing
compliance with Items 1122 (d)(1)(ii), 1122 (d)(4)(iii), 1122 (d)(4)(vii) and 1122 (d)(4)(viii) of Regulation AB, there were no
servicing activities performed by the Company as of and for the year ended December 31, 2017, that required these servicing criteria
to be complied with. We believe that our examination provides a reasonable basis for our opinion. Our examination does not provide
a legal determination on the Company’s compliance with the servicing criteria.



In
our opinion, management’s assertion that the Company complied with the aforementioned servicing criteria as of and for the
year ended December 31, 2017, for the U.S. Bank Corporate Trust Repackaging Platform is fairly stated, in all material respects.



/s/Ernst
& Young LLP



Minneapolis,
Minnesota





February
28, 2018