The new overhead electrification between Glasgow Queen Street at Edinburgh was switched on in 2017 but diesel trains (such as 170454 seen here at Falkik High) will continue to operate for a few more months while the new equipment and trains are tested.
<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>