The Monthly Business Survey (MBS) for Construction and Allied Trades is a monthly survey of businesses within the construction industry in Great Britain. The survey collects data about the value of work undertaken by GB businesses on new housing, new infrastructure, other new construction projects and repair and maintenance during the month. Information about employment is also collected on calendar quarter months. The information is used to monitor the performance of the industry and contributes to gross domestic product (GDP). GDP is an important economic indicator used by the Bank of England, HM Treasury to monitor and forecast economic growth and to inform vital policy decisions. As the data are open for revision for 13mths after annual delivery we will only deliver data which are no longer subject to revision. For example in January 2023 we will be able to deliver final data for December 2021. Ad hoc deliveries could be made subject to interest if needed however these are likely to be revised at a later point in time