WHY? or alternate title: Can one of you Brits explain this to me?

[rob love]

If you look in the photo that has both the collapsible funnel next to the "spout, flexible", one would wonder why they wouldn't just make a horsecock with a larger diameter tube, so as to allow the fuel out more quickly. But then again, I have had the "spout, flexible" come off the can and the fuel rapidly spill down my leg. Something tells me that refueling over the top engine decks of a monstrosity like the Centurian could result in a human torch should the spout come off and the fuel runs all over a hot engine.

Surely the monarchy must have knighted the engineering team that designed and perfected this thing of beauty.