Exhibit 15(a)

Consent of independent registered public accounting firm

We consent to the reference to our firm under “Item 3. Key information” and to the incorporation by reference in the following Registration Statements (Form F-3 No. 333-108084 and Form S-8 Nos. 333-01572, 333-08336, 333-99785, 333-89508, 333-104691, 333-126139 and 333-181334) of InterContinental Hotels Group PLC of our reports dated 17 February 2014, with respect to the Consolidated Financial Statements of InterContinental Hotels Group PLC, and the effectiveness of internal control over financial reporting of InterContinental Hotels Group PLC, included in the Annual Report on Form 20-F for the year ended 31 December 2013.

ERNST & YOUNG LLP

London, England

February 26, 2014