In September 2021, the UK Competition and Markets Authority (CMA) announced the official launch of the Office for the Internal Market (OIM), a new unit within the CMA intended to support the effective operation of the UK internal market through monitoring, publishing reports and advice, and making recommendations to the Government. This article examines (i) what the OIM does and why it was introduced; (ii) how the OIM proposes to carry out its functions; (iii) the OIM’s information gathering powers; and (iv) broader implications for UK competition policy.