I have been asked to reply on behalf of the Cabinet Office. The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply. Letter from Director, Head of Operations: As Director General for the Office for National Statistics, I have been asked to reply to your Parliamentary Questions: (i) what recent estimate he has made of the number of workers in the offshore oil and gas industry who are currently employed on zero hours contracts (170654); and (ii) what recent estimate he has made of the number of workers in the offshore oil and gas industry who are employed using daily agreements with (a) employers and (b) employment agencies. (170655) The requested information is not available. Estimates of people in employment on zero hours contracts are available from the Labour Force Survey but the sample size prevents reliable estimates being produced for individual industry sectors. Information on people who are employed using daily agreements is not collected. According to the ONS Business Register and Employment Survey, the total number of people in the UK employed in businesses whose main activity is the extraction of crude petroleum and/or natural gas was estimated to be 15,600 as at September 2012.