I never fully copped it when the cab arrived but the banner marquee area never lit up. A closer inspection revealed a quite obvious why. No flourescent bulb!
A quick google and I find out that the type of bulb needed is a 580mm long, 20w flourescent. I gave my local electrical wholesalers a call, they have one in stock except it is 18w and not 20w. Close enough!
I picked up the bulb a couple of days later along with a starter just in case. The bulb itself is actually 590mm long. 580mm excluding the tips.