(06 Jan 2013, 12:36 am)tyresmoke wrote I think West Durham Swift will get them as that's been due an upgrade since the Omnicities were debranded and transferred away. The X25 may see cascaded B7TLs? Still a step forward from Tridents...
I'm not sure, as they weren't very good on the 21 and I think the X25 is quite similarly demanding.