If the cameras are HD then they are not willing to pay the extra bandwidth satellite fees to send it out as HD. It is not a TSN issue because all Europeans complain about F1 not being in HD.

How can anyone prefer the Speed broadcast whose three announcers are sitting in a studio somewhere in the US watching the race on TV monitors, while the British guys for TSN are actually at the track for the whole weekend, talking to all the teams & drivers, providing a lot more insight as to what is happening?