EE TV move

Currently debating moving to EE TV over Sky which I've had some time. I left Sky Broadband for EE Broadband a few months ago and so far everything seems ok. Now looking to add TV.

It states I need an arial to watch Freeview channels? Do they not come as part of the TV package anyway? Or is this just off the internet cuts out and you want to watch TV still?

Also, does it have to be roof mounted as it states of can it just be a plug in one for the back of the TV instead of installing to the roof?

Any info would be great.