Bell Canada (BC+A) F-10 Registration of securities (Canada)

Exhibit 5.1

[Letterhead of Deloitte LLP]

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in this Registration Statement on FormF-10 of our reports dated March 8, 2018 relating to the consolidated financial statements of BCE Inc. and subsidiaries (“BCE”) and the effectiveness of BCE’s internal control over financial reporting appearing in the annual report on Form40-F of BCE for the year ended December 31, 2017. We also consent to the reference to us under “Interest of Experts” and “Experts” in the prospectus included in such Registration Statement.

Independent Registered Public Accounting Firm

/s/ Deloitte LLP¹

Montréal, Canada

March 14, 2018

¹  CPA auditor, CA, public accountancy permit no. A104630