Ask any air Uk crew and they should be able to tell you.
This is how I did it:
1)Turn on T.V. to a non pay channel.
2)Select a pay channel and then turn the T.V. Off again quickly.
3)Turn the T.V. on again by selecting the same pay channel and keep the button pressed down.
4)You will see the red L.E.D. Flash. When it stops release the button and press it down again or you will have to repeat steps 1-3.
Some sort of wedge is handy to keep the button pressed down other wise your finger gets tired.
You Perverts all of you!
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Very funny, Scotty. Now beam up my clothes!