The Website status checker [note http://urlchecker.o2.co.uk/urlcheck.aspx] when you type in //skippy.org.uk gives you this screen:
Which to be honest is about as much use as a chocolate teapot; and gives you no information as to why my site was blocked.
The only option is to request reconsideration by scrolling to the bottom of the page and clicking the ‘Continue’ button; This means my request to be de-blocked will be logged and in the queue. This seems to be a manual process, submit site and wait for O2 to be useful… they’ll get around to it eventually.
O2 will do not notify people; you just need to keep checking.
I have written about how I feel about O2 and parental controls they also unilaterally impose on people previously.