Again, what are those "pirate post" stamps?
They were one of many issues used during the UK Postal Strike in 1971.
Organized by Bellerby-Palmer of Exeter for use on mail to Bristol and London.
Apart from the colours shown, there is also a 17½p and 50p vlaue in Olive Green.
The Yellow-Orange label is Imperf.
The others are Rough Rouletted.
Exists a FDC with all 5 values.
All values were printed in sheetlets of 6.