Regulation 15(1) – Two Day Notice (start date) The Building (Registered Building Control Approvers etc.) (England) Regulations 2024 —Please choose an option—West London OfficeNorth London OfficeHertfordshire Office I confirm being the person carrying out the work [The Client] I, (The Client) give notice to Thames Building Control Ltd (The RBCA), the building work as described on the Initial Notice will start on the above date, and I have notified the RBCA at least 2 working days prior, from the date of this notice.