In reply to pigeonjim:
As someone who only boulders orange/blue/red circuits at Font and who has never bouldered in the U.K. I can tell you only that on average an orange problem is easier than a blue which is easier than a red.
I also believe that some of the newer areas grade stiffly even if it's not polished because everyone now thinks that problems started like that.
I have honestly never seen evidence of pof, problems are polished because a lot of people climb them, and some don't clean their shoes.
The only comparison I can make is with Targasonne where a 4c bears no resemblance to a 4c in Font.
I look forward to visiting the U.K and climbing Crescent arête no-handed.