Willis Towers Watson Public Limited (WTW) 8-K History and Development of the Company

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No. 333-184515 on Form S-3 and in Registration Statements No. 333-197706, No. 333-62780, No. 333-63186, No. 333-130605, No. 333-153202, No. 333-153770, No. 333-169961 and No. 333-181150 on Form S-8 of our report dated February 24, 2015 (August [x], 2015 as to Notes 2, 5, 12 and 26) relating to the consolidated financial statements of Willis Group Holdings Public Limited Company for the year ended December 31, 2014 appearing in this Current Report on Form 8-K of Willis Group Holdings Public Limited Company.

London, United Kingdom

August 21, 2015