Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on FormS-8 of our report dated February 24, 2016, relating to the 2015 consolidated financial statements of the Group (comprising RELX PLC, RELX NV, RELX Group plc and its subsidiaries, associates, and joint ventures) appearing in the Annual Report on Form20-F of RELX PLC and RELX NV for the year ended December 31, 2017.
/s/ Deloitte LLP
London, United Kingdom
October 1, 2018
