The logo of Balfour Beatty.
<font face="Trebuchet MS"><b>— <a href="https://en.wikipedia.org/wiki/User:Neurolysis" class="extiw" title="en:User:Neurolysis">neuro</a></b><sup><i><a href="https://en.wikipedia.org/wiki/User_talk:Neurolysis" class="extiw" title="w:User talk:Neurolysis">(talk)</a></i></sup></font>
The logo can be obtained from Balfour Beatty