Used during the 2nd WW until aprox 1949. (I can’t find pictures other than the 1949 Canberra and the Seahawk prototypes of a younger year) The RAF P for Prototype Roundel
[ATTACH=CONFIG]237322[/ATTACH] [ATTACH=CONFIG]237323[/ATTACH] [ATTACH=CONFIG]237324[/ATTACH]
[ATTACH=CONFIG]237325[/ATTACH] [ATTACH=CONFIG]237326[/ATTACH] [ATTACH=CONFIG]237327[/ATTACH]
[ATTACH=CONFIG]237328[/ATTACH] [ATTACH=CONFIG]237329[/ATTACH] [ATTACH=CONFIG]237330[/ATTACH]
The normal color used is yellow but the pics show also a dark (black?) variation. Also normal is a circle around it but without that do exist.
More here: http://forum.keypublishing.com/showthread.php?134859-RAF-Yellow-Prototype-Roundels-Question&p=2223550#post2223550
ps. The Canberra is a pic of a 1999 repainted aircraft