and you have to add an lnb on your existing dish or fit another dish with an lnb on it aimed at another satellite.
A sky dish is a bit small to add another lnb but you can do it, 19.2e Astra 1 is popular with Formula 1 fans with an lnb sat at the right side of the sky lnb (viewed from the front) with a switch & works quite well, 16e is a bit weak to do that & 13e is pushing it as it's too far out, but is just doable.
Or take the plunge a get another dish & then there are a lot of types & sizes to choose from, then there's the number of satellites & lnbs you could have or even one with a motor.