The UK CA Mark came into effect on 1st January 2021. However, to allow businesses time to adjust to the new requirements, it is still possible to use CE Marking for construction products up to and including 30^th June 2025.. (The Government has extended the transition period beyond the original date of 1st January 2022 and later extended date of 1^st January 2023.) Pilkington commenced the roll out of UK CA Marking for its products from 1^st November 2022.