To answer the questions on the many emails I have received on this already!
This is for Sky subscribers only.
This is not for "freesatfromsky" / "free to view" card users.
This is not available on Freesat.
This is available on Virginmedia cable TV (in the UK)
This is not an illegal card sharing scheme.
This is a genuine "free Sky Sports for a weekend" offer from Sky.
This free weekend pass is done a few times a year, sometimes for Sky Sports, sometiems for ESPN, sometimes for Sky Movies, as an advertisiment as to what you coudl watch if you subscribed.
If you Sky+ or SkyHD+ record a programme during a Free Weekend Pass, then you will (Sky say) still be able to watch it AFTER the free weekend pass has ended.