There's nothing factual behind this but it wouldn't surprise me if 8294 - 8306 get withdrawn soon especially being the Euro 4 singles left. There's no use for them unless I'm missing something, be very surprised if they end up getting Euro 6 mods (unless they've been done) and there's no route that needs them assuming that 8319 - 8328 or Streetlites do the 25/28/28A with 8307 - 8309 acting on 34 while spares for the rest.