Thanks, that's what I imagined as it seems common now for folk to use these adapted firestick things. 

I'll stick to freeview and sleep easy ?

One solution would be, fit a mobile 4g router (with data sim in it) & connect this directly to his Cctv, this would give him remote viewing. 
granted would cost him a few extra quid a month topping up pay as you go data but it would work

Ive used this method a few times to remote view empty properties that have no internet connection 

Thanks for this. 

Yes this could be a solution. 

How much data would you think is needed each month - occasional remote viewing - perhaps 20/30 mins per day?

42 minutes ago, inglishg said:

Thanks for this. 

Yes this could be a solution. 

How much data would you think is needed each month - occasional remote viewing - perhaps 20/30 mins per day?

You know it depends on recorder and setup , I seen some apps not release on phones as it's still running in background eating the data lol