"Peter Masson" wrote in message
...
During WW1 the Treasury issued ten shilling and one pound currency notes.
They also printed five shilling, half crown, and one shilling notes, but
AFAIK these were never issued for circulation.
http://xray.sai.msu.ru/~mystery/images/money/UK/UK.html
The Channel Islands still have one-pound notes in regular circulation,
incidentally. I refer to both Guernsey and Jersey.