[Lord Snooty]

That's how I read it. Only read the first line on the Sky Sports site though.

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Here you go. Told you I didn't read it properly.

I just read the bits I've highlighted.

The new technology uses 12 dedicated tracking cameras mounted underneath the roof of the stadium to track the ball and up to 29 data points of each individual player, 50 times per second, calculating their exact position on the pitch. The 29 collected data points include all limbs and extremities that are relevant for making offside calls.