This report covers the activities and performance of the Katowice Committee of Experts on the Impacts of the Implementation of Response Measures in 2026. It contains information on the 14^th and 15^th meetings of the Committee and possible recommendations for consideration by the forum on the impact of the implementation of response measures with a view to the forum recommending actions to the Conference of the Parties at its thirty-first session, the Conference of the Parties serving as the meeting of the Parties to the Kyoto Protocol at its twenty-first session and the Conference of the Parties serving as the meeting of the Parties to the Paris Agreement at its eighth session.