(16 Jun 2022, 5:11 am)Jimmi wrote Certain low height deckers can just about get under there, Arriva on very rare occasions sent E400s under there when the X21 ran to Sunderland: https://flic.kr/p/G2psSH

More reason X6 will never get deckers is it doesn't warrant the capacity of one.

When the Arriva strike was on a few years ago, the X6 and X7 were operated by L94s and the 55 (then X5) was B9s (what ran on the 56 then?)