Hi @Anonymous User
NowTV have introduced a mandatory parental pin for live movies.
More info here.
https://help.nowtv.com/article/what-is-a-parental-pin
You need to set a parental pin (i use 1111 the minimum number of presses of buttons on my nowtv remote).
Once you setup the pin, then switch it off where you don't then need to use a pin for on demand movies, but will be prompted for your pin number every time you watch any live Sky Cinema channels (apart from Sky Disney).
Unfortunately there is no way to switch off or disable the parental pin whilst either watching or channel hopping the live movie channels.