some of the sky movie channels (Sky Movies Action & Thriller Sky Movies Comedy Sky Movies Sci-Fi & Horror Sky Movies Classics Sky Movies Indie Sky Movies Family Sky Movies Drama ) are on Astra 2a NORTH beam. this beam can be tricky to receive at certain times of the day.
in my area (gandia) these channels are worst from around 4pm til 7pm ish. there are a handful of channels (Like UK PEople, UK Food+1, Dave+1, Sky SPorts news, Hallmark, Eurosport 2, Sky 2 and 3) that are also on this wekare bea,m and tend to go off during the afternoon.
if you cannot get these channels at all at any time of the day then i would suggestyour LNB Skew (angle) may need tweeking.
Sky Movies Modern Greats Sky Movies Screen 2 Sky Movies Premiere +1 are on a stronger signal and should be available all day.