Some of the auto-ballaster hoppers in Network Rail's High Output Ballast Cleaner trains were modified by fitting two tanks in the hopper space. Recoded MFS-T, they are easy to spot because of the blue stripe on the hopper. This is number 92473 at the Fairwater High Output Depot in Taunton.
<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>