Arnold Wilkins was originally hired as a helper at Watson Watt's radio lab at the National Physical Laboratory. Several years later he produced simple calculations that demonstrated the basic concepts of radar, and later a lash-up apparatus to demonstrate them in action. Although not as well known as Robert Watt, Wilkins was just as much a father of British radar.
<bdi><a href="https://en.wikipedia.org/wiki/en:Howard_Coster" class="extiw" title="w:en:Howard Coster"><span title="British photographer">Howard Coster</span></a>
</bdi>
1941
<a rel="nofollow" class="external free" href="http://www.npg.org.uk/collections/search/portraitLarge/mw54302/Arnold-Frederic-Wilkins">http://www.npg.org.uk/collections/search/portraitLarge/mw54302/Arnold-Frederic-Wilkins</a>