@Shaunl23 I just came off live chat with that question as I don't have one either and no you don't. Just broadband/wifi connection 🙂
I would imagine that you would need an aerial to get the Freeview channels.
If this has solved your issue please mark this as an accepted solution.
Those little green stars by my name mean that I'm a Community Contributor - not Now TV staff. I just try to help out if I can.
When I asked in an email as well, they replied:
'Sorry to hear your aerial broke during the storm. The good news is you don't need an aerial connection. Just a broadband connection' 🙂
@caseyb1993 that's the response for using a normal NOW TV box. Whilst you'd be able to use all the online bits of the new box, it's possible that the trial will need a working aerial as it is this part which needs testing.