Template:Royal Engineers Corps Flag (united kingdom)
Current flag of the Royal Engineers part of the British Army, note this is the official up too date flag of the corps.
File:File:Royal Engineers Ensign.png Royal Engineers usage:
{{Royal Engineers Corps Flag (united kingdom)
|size=35px
}}
result:
File:File:Royal Engineers Ensign.png Royal Engineers
{{Royal Engineers Corps Flag (united kingdom)
|size=25px
}}
result:
File:File:Royal Engineers Ensign.png Royal Engineers
{{Royal Engineers Corps Flag (united kingdom)}}
result:
File:File:Royal Engineers Ensign.png Royal Engineers
When too use 35
Specifically when it is the main topic, like if it is the main belligerent in a war or in a infobox only linking too it.
When too use 25
When it is a sub-participant of a war, i.e not the main nation.