A domain used to identify money attributes or data elements which comprises of a + or - sign and a £ sign.

AMOUNT STERLING is an amount of money where the CURRENCY TYPE equals 'GBP Pound Sterling'.

References:
The e-GIF version approved for use in NHS England is:
Government Data Standards Catalogue: (GDSC), Version 1.0, Agreed 1 January 2002.
GDSC: http://www.cabinetoffice.gov.uk/govtalk/schemasstandards/e-gif/datastandards.aspx.