Yeah, only McFly's singles can claim (don't know if they'd do that, since they're CDs) to be number ones but only spend 3 weeks inside the top 75. Transylvania was the fastest falling #1 ever wasn't it? #1 - #20.
I reckon it'll get number 1, but that'll be it for them. Now they've left Universal and opted for a more rocky sound I think their chart dominance may be on the whane. Maybe with this album we should expect their first ever non-top 10 singles.