@Reyn,
Reyn, I'm suspecting you haven't see the words TOP and END next to the scroll bar.
I'll agree they are minute, and I don't quite get why except they are put there by young guys with swell eyes. Stare a bit and you'll see them, I hope. I have bad eyes and I can see them since I know they're there.
But, click on End, and the page will plummet, and click on Top, vice versa.