White XXII inside a black rectangular box.  This is the common usage badge of 22 Signal Regiment
<a href="//commons.wikimedia.org/w/index.php?title=User:DayRHC1983&amp;action=edit&amp;redlink=1" class="new" title="User:DayRHC1983 (page does not exist)">22 Signal Regiment</a>
<span class="int-own-work" lang="en">Own work</span>