In the UK, the Office for National Statistics regularly

produces and publishes a wide range of the information about the United Kingdom >that can be used for social and economic policy-making as well as painting a >portrait of the country as its population evolves over time. (from Wikipedia article)

My question is whether the status of the ONS as an executive office of a non-ministerial department (reporting directly to Parliament) gives it the right to request (/demand) data (for example, for the production a particular indicator that has been requested by Parliament), or advice, without paying for it.