Looks like the two "official" UK mirrors of FC3T1 at ftp.mirror.ac.uk ("Permission denied") and zeniiia.linux.org.uk (not even a "test" subdir !) both don't have it at the moment. Exactly the same thing happened with previous FC test and final releases - a shame the UK only has 2 official mirrors and neither have the ISOs available on the day of release, despite mirrors being given several days to sync up.
I used the ftp.qucknet.nl (lives up to name !) mirror in the Netherlands for FC2, but that hasn't got it either, so I'm grabbing it from another Netherlands mirror at the moment (alviss.et.tudelft.nl). The reason I pick the Netherlands for non-UK transfers is that they have the best network connectivity on continental Europe and, let's face it, the US mirrors will all be clogged up
Oh, don't forget to get the MD5SUM file and "md5sum" your .iso image to confirm it transferred OK before you scoot off to your CD/DVD burner...