Weekly data are collected every Wednesday. Monthly data are computed as the average of the four or five weekly figures for the month.
Weekly data are available from 1990 for notes and coin and from May 2006 for reserves balances. Monthly data are available from 1969 for notes and coin and from May 2006 for reserves balances. Notes and coin and reserves balances data are available in Notes and coin and reserves balances (Table A1.1.1). The monthly notes and coin data is available not seasonally adjusted and seasonally adjusted, and there is also an additional series which is adjusted for special non-seasonal factors, such as the £1 note write-off in 1998, the funding of the winter fuel payments, the turn of the millennium, the fuel dispute of 2000, and the threatened strike action affecting note distributors in 2003. Reserves balance data are not seasonally adjusted.
The average outturns for the month are published in the Narrow Money (notes and coin) and Reserves Balances statistical release five working days after the last Wednesday of the month.