yeah apply pressue on the roof around the base and pull hard, feels like you will break something but it will come in the end
 
Stand to the side, unscrew and tilt down, pull it outwards and wiggle it back and forth. Mine came out easy.
 
if your wanting to replace it with a stubby one, dont bother, the reception i got from my C2 Stubby aerial was pants!
 
if your wanting to replace it with a stubby one, dont bother, the reception i got from my C2 Stubby aerial was pants!

Same here! i just put one on last week and you cant get anything at my house now. Looking at maybe getting a booster but not sure the effectiveness of them