A series for the GDP deflator in index form is produced by the Treasury from data provided by the Office for National Statistics (ONS) and the Office for Budget Responsibility (OBR). The GDP deflator set is updated after every ONS Quarterly National Accounts release (at the end of each quarter) and whenever the OBR updates its GDP deflator forecasts.
Outturn data are the latest Quarterly National Accounts figures from the ONS, 30 September 2015. There are additional updates to Money GDP following the publication of the ONS National Accounts Blue Book on 30 October 2015. GDP deflators from 1955-56 to 2014-15 have been taken directly from fiscal period ONS series L8GG. GDP deflators from 1955 to 2014 have been taken from calendar period ONS series MNF2. Money GDP for calendar and fiscal periods taken from ONS series BKTL.
Forecasts are from the OBR as at the 08 July 2015 Budget.
The next scheduled GDP deflator update will be shortly after the joint Autumn Statement and Spending Review scheduled for 25 November 2015.