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I have never had any problems with TV link (cable connection) on my Sky box and assume that I can carry on using the same connection - although I understand that the remote is not compatible - I have been told that a "Sky Navigator which as all he functions of a sky+ remote control via your television, for �1.50 this is a special offer which can only be ordered online and is one per household."
So I guess that's a bargain then - since it normally costs �29.99 from Sky