porlock hill in somersets 1/4 for 2 miles..
Hardest passes Ive done in the UK is in the lakes, Wrynose then straight after the Hardnott pass.

)Haha, when i did those, not only were people walking up, but there was also people walking down the other side again because it's so steep
(Yes, i was one of the people walking up)

No its not. It has a max of 25%, its 12% average.
It's also very short, so completely different to a 10/15k climb with the same average gradient.
Where do you get your info?
Mark Cavendish said:Today's stage can be put into perspective by the fact that by the end I didn't care that I was just puking over myself. Hills+Heat=Suffering
Ordnance survey
Ah, ive cycled a few times and the 25% part starts after the first corner and goes for a good mile, and flattens out towards the top.. I was going by the road signage tho..
The steepest I've climbed in one ride is the Cat and Fiddle, Winnats Pass and Holme Moss as part of the 100 mile Tour of the Peaks. Holme Moss averages 12% over 2km and is also the highest classified road in England.11% is very steep!
Looking on strava for something to compare it near redditch, but (unsurprisingly) i cant find anything.
prospect hill is probably the closest, but it only averages 5%, with 8% max. (and is a 28th of the length)
The steepest I've climbed in one ride is the Cat and Fiddle, Winnats Pass and Holme Moss as part of the 100 mile Tour of the Peaks. Holme Moss averages 12% over 2km and is also the highest classified road in England.
I've also done Mow Cop which has a final run of 25% for 200 metres (2 miles total climbing)
Clearly none of these come anywhere near the mountain stages in the tour.
::Edit::
If you're interested in challenging UK climbs then this book is worth buying.
http://www.amazon.co.uk/100-Greatest-Cycling-Climbs-Cyclists/dp/0711231206
Im looking on the net to get facts into a climb from Penrith to Alston, north Cumbria, this was a very unexpected high/long climb to our shelter, it didn't help that it was snowing at the time.

Well well aparently Sat & Sunday are to be covered by ITV1.
Yep. Cue all those that think they know everything about cycling, have always been into it, and want to latch onto a bit of glory.
Can I have my minority sport back please. Thanks.
I also can't wait for the advertisers to get hold of it. Magic.