Construction output estimates are a short-term indicator of construction output by the private sector and public corporations within Great Britain and are produced from a monthly survey of 8,000 businesses in Great Britain. The estimates are produced and published at current prices (including inflationary price effects) and at chained volume estimates (with inflationary effects removed) both seasonally and non-seasonally adjusted. Detailed estimates along with a longer run of time series data are available to download in the Output in the Construction Industry, July 2014 reference tables. In these tables, users will find chained volume estimates back to Q1 1997 and monthly estimates back to January 2010. Current price non-seasonally adjusted data are available back to Q1 1955. More information on these statistics can be found in the ‘Definitions and explanations’ section in the background notes. It should be noted that due to seasonal adjustment taking place on a short span of data points used to interpret the seasonal effects (55 months), there is potential for increased revisions until the seasonal pattern is established within the time series. The seasonal pattern is generally established after 60 months in a monthly time series. New orders in the construction industry estimates are a short-term indicator of construction contracts for new construction work awarded to main contractors by clients in both the public and private sectors within the UK. The estimates are produced and published both seasonally and non-seasonally adjusted at current prices (including inflationary price effects) and at constant prices (with inflationary effects removed). Since Q2 2013 these data have been supplied by Barbour ABI . Further details can be found in the background notes section of this bulletin. Detailed estimates on new orders are available to download in the New Orders in the Construction Industry, Q2 2014 reference tables. In these tables, users will find volume estimates back to Q1 1964, current price data are also available for this time period. Value data is available for a more granular level of type of work back to Q1 1985 along with regional data for the main types of work.