(23 Aug 2015, 5:27 pm)R852 PRG wrote The Vykings weren't ideal for the infrastructure up here. I can remember aureolin telling me that the middle doors would open onto the glass window of a bus shelter or a railing. I'm guessing the Presidents were either modified for extra seating capacity or to prevent this, as they were dual-door too.
The Vykings will never be converted as the rear door is what makes them DDA-compliant but 6008-6042 could be kept DDA-compliant. The rear door wasn't ideal unless you were at Gateshead.