The Statist, Beginning February, 1913, Compiles The Data According To Augustus Sauerbeck'S Method. The Base For July, 1886-March, 1895 Is 69.0695. The Base For April, 1895-September, 1904 Is 67.2868. The Base For October, 1904- September, 1909 Is 75.1466. The Base For October, 1909-September, 1914 Is 81.960. The Base For October, 1914-April, 1919 Is 151.66. The Base For May, 1919-June, 1921 Is 220.79. The Base For July, 1921-July, 1926 Is 134.58 Source: Journal Of The Royal Statistical Society, Vol. 50, P.727, And Following Journals. The Statist, June 28, P.134 And Following Issues.
This NBER data series q04053 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: q04053
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price Index, All Commodities for Great Britain [Q04053GBQ312NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q04053GBQ312NNBR/, August 28, 2015.