The railway through Filton was reduced from four to two tracks in 1984 but now needs to be increased to four again to cope with more trains. However Filton station has been moved since then blocking the old trackbed so the cutting has to be widened to accommodate the extra track and platform.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>