He was also a tireless campaigner for the preservation of cultural heritage worldwide.

Since then, he has become a tireless campaigner to raise awareness about post-traumatic stress disorder, rather than slink into the shadows.

Perhaps more importantly, he was a tireless campaigner to open up the countryside.

As a suffragist (as opposed to a suffragette), she took a moderate line, but was a tireless campaigner.

He was a tireless campaigner for modernization of the armed forces.