睇廠方資料其實唔係好睇得出 System 400/5、System 400/6 同 System 400/7 有咩大分別,
只不過睇相 System 400/6 就跟o左扶手,
但好明顯見到 Volgren 車身用果款應該係 System 400/7,
因為扶手柱椅背扶手個連接位係同直梯車唔同,
估計直梯車應該係用緊 System 400/6。
The two-axle B9 was still in Heysham this evening, and looks like it should be there tomorrow as well. Unfortunately, it's still sandwiched by a AVBWU and the same truck, and I can't get a shot any better than Alistair did.
From what I see though, it does look to have the same layout as the Citybus one - spiral staircase certainly.