TV Virgins

Sugs

We have only been caravanning for 41 years but have never taken a tv with us - we see enough at home. However we go to Lady Margaret's Park on Wednesday and think it might be good to take on with us - my wife thinks it so she can watch strictly but it is
really for the rugby! BUT our van (Dethleffs Nomad 560) doesn't have a roof mounted aerial. Does this mean I have to buy an external one? We see so many people plugging in the electrics and a white cable, does this suffice or is it merely a booster? I'm sure
someone can help