I have a Geoffrey Butler frame and fork.  I have found thru Bikeforums and the person I purchased it from that it is a Butler but in one conversation I have been told that it was built by Charles Roberts, But I have not received an answer from the guy who told me this as to his definitive reason.
Here are a few pictures
				
			Here are a few pictures
 
			 
			 
			 
			 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		