(27 Nov 2016, 10:21 am)S813 FVK wrote Deckers are able to go through the Tyne Tunnel.
I recall that Percy Main weren't keen on running Deckers as Northbound there's a height restriction of 13'1" in lane 2, and buses ideally need to use lane 2 at the Tunnel exit to go to Howdon. All other lanes can accommodate them.
Anyhow, Deptford chooses not to allocate them even on a Saturday when the misc workings the Vykings are allocated to don't run, and there must be a reason for this. They're more likely to be seen on the 20/20A on a match day.